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Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency

Coming to market in January 2021, the Samsung Galaxy S21 5G (Snapdragon)’s launch price puts it into the Premium ($600-$799) segment. Like its Exynos twin, it comes with a number of attractive features, including a triple-camera setup. Our team of battery experts recently put it through our DXOMARK testing protocol; what follows is a summary of the results.

Key specifications:

  • Battery capacity: 4000 mAh
  • 25W (charger not included)
  • 6.2-inch, 1080 x 2400, 120 Hz OLED display
  • Qualcomm Snapdragon 888 5G (5 nm) chipset
  • Tested RAM / storage combination: 8 GB + 128 GB

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 1Samsung Galaxy S21 5G (Snapdragon)

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 2

69

battery

Pros

  • Good efficiency both during charge up and when in use
  • Charger has very low residual power drain both during trickle charging and when phone is not connected
  • Wireless charging is convenient

Cons

  • Below-average charging speed
  • Above-average battery drain when screen is off in idle, music streaming and calls

The Samsung Galaxy S21 5G (Snapdragon) racks up an above-average overall score in its segment, beating its Exynos sibling and doing largely better than the two competitor devices in this review, the Apple iPhone 12 mini and the Google Pixel 5, due primarily to better performance in our autonomy tests. The table below shows the battery capacity, charger, display type and resolution, and processor specifications for the Snapdragon version of the S21 5G and for the Apple and Google devices.

 Samsung Galaxy S21 (Snapdragon)

Apple iPhone 12 miniGoogle Pixel 5
Battery capacity (mAh)

4000

22274080
Charger

25W

20W18W
Wireless charging

15W

12W

12W

Display type, max Hz

OLEDOLED

OLED

Display resolution

1080 x 24001080 x 2340

1080 x 2340

Chipset

Qualcomm Snapdragon 888 5GA14 Bionic

Qualcomm Snapdragon 765 5G

Autonomy (55)

How long a battery charge lasts depends not only on battery capacity, but also other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.

Light Usage

71h

Light

Active: 2h30/day

Moderate Usage

50h

Moderate

Active: 4h/day

Intense Usage

31h

Intense

Active: 7h/day

Among its competitors, the Samsung Galaxy S21 5G (Snapdragon) puts in a good performance, with a score that is above average for its segment, but just under the average for the entire Battery protocol database.

In terms of linearity, the battery percentage indicator on the Samsung S21 5G (Snapdragon) is very accurate and reliable.

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 4

Stationary

Samsung Galaxy S21 5G (Snapdragon)

57

104

Vivo Y72 5G

Best: Vivo Y72 5G (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

In our TUS tests, the Samsung Galaxy S21 5G (Snapdragon) lasts more than 56 hours, which is both above average for its segment and longer than its rivals, with the Apple iPhone12 mini coming in at 43 hours 22 minutes and the Google Pixel 5 lasting for 47 hours 30 minutes. However, the Samsung’s results are around four hours less than the average for all tested devices in our database.

Typical Usage Scenario discharge curves

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 5

On the go

Samsung Galaxy S21 5G (Snapdragon)

55

96

Samsung Galaxy M51

Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

The Samsung Galaxy S21 5G (Snapdragon)’s performance is very close to that of its rivals except for calling, where it did noticeably better than the Apple and Google devices (though only around the average for other devices in its price range).

Estimated autonomy for on the go use cases (full charge)

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 6

Calibrated

Samsung Galaxy S21 5G (Snapdragon)

58

100

Samsung Galaxy M51

Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

Both the Samsung and Google devices beat the Apple iPhone12 mini across the board, and while the Samsung takes the lead in 4G streaming and gaming tests, the Google Pixel 5 is ahead of the Samsung for 3G calling and video playback.

Estimated autonomy for calibrated use cases (full charge)

Charging (73)

The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from 0% to 80% capacity and from 80% to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired

Wired

Wireless

Wireless

Power consumption and battery level during full charge

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 7

Full charge

Samsung Galaxy S21 5G (Snapdragon)

78

106

OnePlus 9

Best: OnePlus 9 (106)

The Samsung Galaxy S21 5G went from 0 to an 80% in 48 minutes 34 seconds, which is better than its rivals, but it needed more than 45 minutes to charge from 80% to full capacity. Our engineers note that its charger never reached its maximum power of 25W.

While it takes the Snapdragon version of the S21 5G one hour longer to achieve a 100% charge via wireless charging, it is still a convenient option.

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 8

Quick boost

Samsung Galaxy S21 5G (Snapdragon)

67

108

Oppo Reno6 5G

Best: Oppo Reno6 5G (108)

The Samsung Galaxy S21 5G (Snapdragon) provides more than two hours of autonomy when charged at 20%, 40%, 60%, and 80%, beating both the Apple and Google devices for longevity following a 5-minute charge. Even so, the Samsung’s performance is below average for its segment.

Samsung Galaxy S21 5G (Snapdragon)Apple iPhone 12 miniGoogle Pixel 5
Autonomy boost (hh:mm)20%2:382:432:16
40%2:452:312:16
60%2:091:531:46
80%1:571:201:13
Percentage boost20%7.4 %9.5 %6.9 %
40%7.7 %8.8 %6.9 %
60%6 %6.6 %5.4 %
80%5.5 %4.7 %3.7 %
Energy consumed20%1466 mWh1205 mWh1654 mWh
40%1528 mWh1119 mWh1656 mWh
60%1195 mWh838 mWh1294 mWh
80%1088 mWh591 mWh894 mWh

Efficiency (89)

Our Efficiency score comprises two sub-scores, Charge up and Discharge. Charge up is the efficiency of a full charge (how much energy is drained from the wall outlet vs the energy capacity of the battery, as well as the efficiency of the charger and its residual consumption). Discharge is how much current the smartphone drains from the battery when in use (the ratio of battery capacity to autonomy). Better autonomy with a smaller battery means better efficiency.

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 9

Charge up

Samsung Galaxy S21 5G (Snapdragon)

78

84

OnePlus 9

Best: OnePlus 9 (84)

Compared to its rivals, the S21 5G (Snapdragon) charging system is well designed, providing better charge and adapter efficiency, and better management of residual power drain.

Samsung Galaxy S21 5G (Snapdragon) Battery review: Good efficiency 10

Discharge

Samsung Galaxy S21 5G (Snapdragon)

90

121

Apple iPhone 13

Best: Apple iPhone 13 (121)

The Samsung Galaxy S21 5G (Snapdragon) had good efficiency in all screen-on tests (gaming, video streaming, video playback), though the iPhone 12 mini is much more efficient, and can last almost as long with a much smaller 2227 mAh battery.

Conclusion

The Samsung S21 5G (Snapdragon) achieves decent autonomy overall, but it would have been nice to pair that with faster charging, which is quite common at this price range.

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New leader has great charging and efficiency

New leader has great charging and efficiency

New to the European market in September 2021, the Oppo Reno6 5G fits in our High-end ($400-599) segment and comes with a number of attractive features, including a multi-camera setup with a 64 MP main camera. Let’s take a look at some of its key battery results.

Key specifications:

  • Battery capacity: 4300 mAh
  • 65W charger
  • 6.43-inch, 1080 x 2400, 90 Hz OLED display
  • MediaTek Dimensity 900 (6 nm) chipset
  • Tested ROM / RAM combination: 128 GB + 8 GB

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

Pros

  • Very good charging time and outstanding charging efficiency
  • Good autonomy performance (top score in its segment)
  • Gains 10+ hours of autonomy with a 5-minute charge when under 50% capacity

Cons

  • Average performance in mobility
  • Below-average autonomy for calls

The Oppo Reno6 5G turned in a stellar battery performance, taking top marks in certain categories and coming in first globally among all devices in our database as of this writing. The device is well balanced overall and provides a good comprehensive experience.

We compared the Oppo Reno6 5G’s performance in several key categories with two other devices in our High-end segment, the Realme GT 5G and the Samsung Galaxy A52 5G; battery capacity, tested charger, display type and resolution, and processor specifications for the three devices are shown in the table below.

Oppo Reno6 5GRealme GT 5GSamsung Galaxy A52 5G
Battery capacity (mAh)430045004500
Charger65W65W15W
Display typeOLEDOLEDOLED
Display resolution2400 x 10802400 x 10802400 x 1080
ChipsetMediaTek Dimensity 900Snapdragon 888 5GSnapdragon 750G 5G

Autonomy (73)

How long a battery charge lasts depends not only on battery capacity but also on other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios. 

Light Usage

83h

Light

Active: 2h30/day

Moderate Usage

57h

Moderate

Active: 4h/day

Intense Usage

35h

Intense

Active: 7h/day

Leading its segment for overall autonomy, the Oppo Reno6 5G provides 57 hours of autonomy with moderate use, which is five hours more than Realme GT 5G and one hour more than the Samsung Galaxy A52 5G.

New leader has great charging and efficiency 11

Stationary

Vivo Y72 5G

Best: Vivo Y72 5G (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

Garnering the top score for this sub-attribute in the High-end segment, the Oppo Reno6 5G lasted roughly 10 hours more than its competitors in our TUS tests. However, it lost some 2% of its battery charge at night, which is similar to the Realme GT 5G’s performance, but behind the Samsung Galaxy A52 5G at 1.33%.

Typical Usage Scenario discharge curves

New leader has great charging and efficiency 12

On the go

Samsung Galaxy M51

Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

On the go testing proved to be the only category in which the Oppo Reno6 5G fell below our database average, coming in 6 points behind the Realme GT and 12 points behind Samsung Galaxy A52 5G. The Reno6 did well for social apps, staying just ahead of its rivals, but in all other areas, it is behind (and sometimes far behind) both the Realme and Samsung devices.

Estimated autonomy for on the go use cases (full charge)

New leader has great charging and efficiency 13

Calibrated

Samsung Galaxy M51

Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

With the exception of 3G calling, where it lags about 6 hours behind the Realme and Samsung, the Reno6 put in a decent performance in our calibrated tests.

Estimated autonomy for calibrated use cases (full charge)

Charging (109)

The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from zero to 80% capacity and from 80 to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired

Wired

The Oppo Reno6 5G is currently in the top slot for charging in our Battery protocol database, 7 points ahead of the Realme GT 5G and more than 40 points ahead of the Samsung Galaxy A52 5G.

Power consumption and battery level during full charge

New leader has great charging and efficiency 14

Full charge

OnePlus 9

Best: OnePlus 9 (106)

The Oppo Reno6 5G and the Realme GT 5G both come with 65W chargers, which certainly helps reduce the time they take to reach a full charge. The Samsung Galaxy A52 5G comes with only a 15W charger for filling its 4500 mAh battery and thus ends up far behind the other two devices.

New leader has great charging and efficiency 15

Quick boost

Another top performance from the Oppo Reno6 5G, whose 10-hour gain in quick-boost autonomy is better than the Realme’s at all stages (20%, 40%, 60%, 80%) and far ahead of the Samsung’s.

Oppo Reno6 5GRealme GT 5GSamsung Galaxy A52 5G
Autonomy boost (hh:mm)20%11:357:471:49
40%10:127:201:51
60%7:125:071:54
80%5:323:451:58
Percentage boost20%24.7 %21.7 %5.1 %
40%21.8 %20.5 %5.2 %
60%15.4 %14.3 %5.4 %
80%11.8 %10.5 %5.6 %
Energy consumed20%5060 mWh4783 mWh1235 mWh
40%4457 mWh4505 mWh1260 mWh
60%3151 mWh3148 mWh1293 mWh
80%2417 mWh2308 mWh1346 mWh

Efficiency (101)

The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge rate, both of which combine data obtained during robot-based typical usage scenario testing, outdoor mobility testing, charging evaluation, and power measurements, and then take into consideration the device’s battery capacity.

The Oppo Reno6 5G earned a first-place score for overall Efficiency both in its segment and across the entire Battery protocol database to date.

New leader has great charging and efficiency 16

Charge up

OnePlus 9

Best: OnePlus 9 (84)

The Oppo Reno6 5G has the best charge-up efficiency in its segment — around 1% more efficient than the Realme GT 5G and 9% more than the Samsung Galaxy A52 5G. However, the Oppo’s residual power drain is above average, so users should unplug the charger from the electrical outlet when done charging.

New leader has great charging and efficiency 17

Discharge

Apple iPhone 12 mini

Best: Apple iPhone 12 mini (121)

Despite having the smallest battery among the three devices in this comparison, the Oppo’s low daytime current discharge contributes to a good performance during TUS testing. In calibrated tests, its mean current discharge of 161 mA bests the Realme (199 mA) and just edges out the Samsung (165 mA).

OppoReno has a low discharge current in almost all tests except for 3G calling, where it has the highest discharge among the three devices here.

Conclusion

Despite coming in behind its rivals when used for phone calls, the Oppo Reno6 5G is a very well-balanced and well-designed device that shows good autonomy and outstanding results for charging and charge-up efficiency.

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Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency

Released in January 2021 at a price that places it in the Premium segment ($600-$799), the Samsung Galaxy S21 5G (Exynos) comes with a triple-camera setup and stereo speakers, among other attractive features. Let’s take a look at how its battery performed in our DXOMARK Battery protocol tests.

Key specifications:

  • Battery capacity: 4000 mAh
  • 25W (charger not included)
  • 6.2-inch, 1080 x 2400, 120 Hz OLED display
  • Exynos 2100 (5 nm) chipset
  • Tested RAM / storage combination: 8 GB + 128 GB

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 18Samsung Galaxy S21 5G (Exynos)

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 19

63

battery

Pros

  • Decent efficiency, especially charge up
  • Supports wireless charging

Cons

  • Despite smaller battery, slower charging speed than competition

The Samsung Galaxy S21 5G (Exynos) smartphone comes with a smaller battery and a slower charger than the two Premium devices used for comparison in this review, the Xiaomi Mi 11 and the Oppo Find X3 Neo. The table below shows the battery capacity, charger, display type and resolution, and processor specifications for the three devices.

 Samsung Galaxy S21 (Exynos)

Xiaomi Mi 11Oppo Find X3 Neo
Battery capacity (mAh)

4000

46004500
Charger

25W

55W65W
Wireless charging

15W

50W

No

Display type, max Hz

OLEDOLED

OLED

Display resolution

1080 x 24001440 x 3200

1080 x 2400

Chipset

Exynos 2100Qualcomm Snapdragon 888 5G

Qualcomm Snapdragon 865 5G

Autonomy (51)

How long a battery charge lasts depends not only on battery capacity, but also other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.

Light Usage

65h

Light

Active: 2h30/day

Moderate Usage

46h

Moderate

Active: 4h/day

Intense Usage

29h

Intense

Active: 7h/day

The overall autonomy score for the Exynos version of the Samsung Galaxy S21 5G places it between the Xiaomi Mi 11 (36) and the Oppo Find X3 Neo (60). The Samsung provides relatively good autonomy despite its small 4000 mAh battery, while the Xiaomi struggles with a more power-consuming QHD+ display.

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 21

Stationary

Samsung Galaxy S21 5G (Exynos)

54

104

Vivo Y72 5G

Best: Vivo Y72 5G (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

Lasting 51 hours 27 minutes in our TUS tests, the Samsung Galaxy S21 5G (Exynos) lands in the bottom quarter of the DXOMARK database. While it is still ahead of the Xiaomi Mi 11, the Oppo lasts 7 hours 30 minutes longer.

Typical Usage Scenario discharge curves

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 22

On the go

Samsung Galaxy S21 5G (Exynos)

54

96

Samsung Galaxy M51

Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

The Samsung device goes head to head with the Oppo Find X3 Neo in all mobility use cases, and both the Samsung and the Oppo perform slightly better than the Xiaomi Mi 11.

Estimated autonomy for on the go use cases (full charge)

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 23

Calibrated

Samsung Galaxy S21 5G (Exynos)

52

100

Samsung Galaxy M51

Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

While the performance of the Exynos version of the Galaxy S21 5G for gaming and for video and music streaming via 4G was disappointing, the device did a good job for both video streaming via WiFi and video playback. But the Oppo Find X3 Neo had better autonomy in all calibrated use cases.

Estimated autonomy for calibrated use cases (full charge)

Charging (73)

The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from 0% to 80% capacity and from 80% to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired

Wired

Wireless

Wireless

The S21 5G (Exynos)’s charging performance is average among all devices tested, but its rivals do better, especially the Oppo Find X3 Neo, one of the top scorers for this attribute to date.

Power consumption and battery level during full charge

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 24

Full charge

Samsung Galaxy S21 5G (Exynos)

75

104

Oppo Find X3 Pro

Best: Oppo Find X3 Pro (104)

It takes the Samsung Galaxy S21 5G (Exynos) 48 minutes to go from 0 to an 80% charge, which is good. However, the Xiaomi Mi 11 takes just 30 minutes to achieve the same charge, and the Find X3 Neo takes even less time — only 23 minutes.

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 25

Quick boost

Samsung Galaxy S21 5G (Exynos)

66

95

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (95)

Users can expect only 2 hours 30 minutes of additional battery life after charging the Samsung Galaxy S21 5G (Exynos) for 5 minutes with 20% power remaining, which is a poor showing when compared to the Oppo Find X3 Neo in particular.

Samsung Galaxy S21 5G (Exynos)Xiaomi Mi 11Oppo Find X3 Neo
Autonomy boost (hh:mm)20%2:332:528:20
40%2:363:096:26
60%2:052:545:29
80%2:011:514:14
Percentage boost20%7.4 %11.2 %22.1 %
40%7.6 %12.3 %17 %
60%6.1 %11.3 %14.5 %
80%5.9 %7.3 %11.2 %
Energy consumed20%1458 mWh2674 mWh4712 mWh
40%1487 mWh2945 mWh3637 mWh
60%1192 mWh2709 mWh3103 mWh
80%1148 mWh1735 mWh2399 mWh

Efficiency (75)

Our Efficiency score comprises two sub-scores, Charge up and Discharge. Charge up is the efficiency of a full charge (how much energy is drained from the wall outlet vs the energy capacity of the battery, as well as the efficiency of the charger and its residual consumption). Discharge is how much current the smartphone drains from the battery when in use (the ratio of battery capacity to autonomy). Better autonomy with a smaller battery means better efficiency.

The Samsung Galaxy S21 5G (Exynos) posts an average overall score in our Efficiency testing. Among its rivals, it is far ahead of the Xiaomi (46) but behind the Oppo (87).

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 26

Charge up

Samsung Galaxy S21 5G (Exynos)

79

82

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (82)

The Samsung Galaxy S21 5G (Exynos)’s adapter is very efficient and consumes almost nothing (just 11 mW) when the phone is detached. By contrast, however, users should unplug the Samsung’s wireless charger when not in use.

Samsung Galaxy S21 5G (Exynos) Battery review: Good charge-up efficiency 27

Discharge

Samsung Galaxy S21 5G (Exynos)

73

121

Apple iPhone 12 mini

Best: Apple iPhone 12 mini (121)

The Samsung device lands between the Xiaomi (46) and the Oppo (85) for discharge efficiency, and despite its relatively small battery capacity (4000 mAh), it offers decent autonomy.

Conclusion

The Samsung Galaxy S21 5G (Exynos) is a well-built device, which is reflected in its decent scores for efficiency. While it lands in the bottom half of our database among all devices tested to date, it is well within the norms for Premium segment devices. The Xiaomi and Oppo smartphones have much better charging times compared to the S21 5G, but the Samsung device’s charging is nonetheless very efficient.

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Oppo A94 5G Battery review: Good discharge efficiency

Oppo A94 5G Battery review: Good discharge efficiency

Entering the market in April 2021, the Oppo A94 5G comes with an FHD+ AMOLED display and a quad-camera setup with a 48 MP main camera, and lands in our Advanced smartphone segment ($200-399). We put the Oppo A94 5G through our comprehensive suite of battery tests and present a summary of the results here.

Key specifications:

  • Battery capacity: 4310 mAh
  • 30W charger included
  • 6.43-inch, 1080 x 2400, 60 Hz AMOLED display
  • MediaTek Dimensity 800U 5G (7 nm) chipset
  • Tested RAM / storage combination: 8 GB + 128 GB

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

Pros

  • Battery discharge is extremely efficient
  • Considerably lower power consumption than competition for video streaming and video playback
  • Provides more than 2 days (58 hours) of autonomy with moderate use

Cons

  • Low performance in 3G calling and music streaming in calibrated mode

The Oppo A94 5G’s global score of 82 puts it among the current top 10 devices of our database, where it sits one point above the Oppo Find X3 Neo.

The table below shows the battery capacity, charger, display type and resolution, and processor specifications for the Oppo A94 5G, the Samsung A52 5G ($300-499 High-end segment), and the Xiaomi Redmi Note 10 Pro (Advanced segment).

Oppo A94 5G

Samsung A52 5G

Xiaomi Redmi Note 10 Pro

Battery (mAh)

4310

4500

5020

Charger

30W

15W

33W

Display type

AMOLED

AMOLED

AMOLED

Resolution

1080 x 2400

1080 x 2400

1080 x 2400

Processor

MediaTek Dimensity 800U 5G (7 nm)

Qualcomm Snapdragon 750G 5G (8 nm)

Qualcomm Snapdragon 732G (8 nm)

Autonomy (68)

How long a battery charge lasts depends not only on battery capacity, but also other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.

Light Usage

84h

Light

Active: 2h30/day

Moderate Usage

58h

Moderate

Active: 4h/day

Intense Usage

36h

Intense

Active: 7h/day

With an autonomy score of 68, the Oppo A94 5G comes in 10 points behind Redmi Note 10 Pro (78) and 6 points ahead of the Samsung Galaxy A52 5G.

Oppo A94 5G Battery review: Good discharge efficiency 28

Stationary

Wiko Power U30

Best: Wiko Power U30 (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

The big difference between the A94 5G’s autonomy score and that of the Redmi Note 10 Pro is attributable to the former having a shorter TUS duration and considerably lower performance during 3G calling and music streaming.

That said, Oppo A94 5G achieves more than 2.5 days in our TUS autonomy tests, which is four hours longer than the Samsung Galaxy A52 5G (which has a bigger battery), but 8 hours less than Xiaomi Redmi Note 10 Pro. During the night, the Oppo A94 5G lost 1.33% battery level per night (which is quite good), though it is slightly higher than the Redmi Note 10 Pro’s loss of only 1%.

Typical Usage Scenario discharge curves

Oppo A94 5G Battery review: Good discharge efficiency 29

On the go

Samsung Galaxy M51

Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

Oppo A94 5G Battery review: Good discharge efficiency 30

The Oppo A94 5G performed well on the go.

The Oppo A94 5G puts in a very good on the go performance for social apps, even though the Xiaomi Redmi Note 10 Pro does a bit better. The A94 5G’s results for navigation were just average, however, with the Samsung Galaxy A52 5G lasting some two hours longer in that sub-category.

Estimated autonomy for on the go use cases (full charge)

Oppo A94 5G Battery review: Good discharge efficiency 31

Calibrated

Samsung Galaxy M51

Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

The Oppo A94 5G is better than its competitors when it comes to streaming video (whether via 4G or WiFi) and video playback. However, it fell behind the Samsung and considerably behind the Xiaomi in our music streaming in 4G and 3G calling use cases.

Estimated autonomy for calibrated use cases (full charge)

Charging (83)

The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from 0% to 80% capacity and from 80% to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired

Wired

Oppo A94 5G showed better performance than either of its rivals, especially during our full charge tests, racking up 6 points over the Xiaomi Redmi Note 10 Pro and a whopping 22 points over the Samsung Galaxy A52 5G.

Power consumption and battery level during full charge

Oppo A94 5G Battery review: Good discharge efficiency 32

Full charge

Oppo Find X3 Pro

Best: Oppo Find X3 Pro (104)

The Oppo A94 5G needs just 53 minutes to go from empty to 100% showing on its battery level indicator, and just 6 more minutes beyond that to get its 4310 mAh battery fully charged. Its excellent charging time is 33 minutes faster than the Redmi Note 10 Pro and an hour faster than the Samsung Galaxy A52 5G.

Oppo A94 5G Battery review: Good discharge efficiency 33

The Oppo A94 5G displayed excellent charging times.

Oppo A94 5G Battery review: Good discharge efficiency 34

Quick boost

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (95)

By plugging in the smartphone for 5 minutes at less than 40% battery level, users will be able to gain 4 hours and 33 minutes of autonomy — an impressive result that nearly ties that of the Oppo’s competitor, the Redmi Note 10 Pro (4 hour 37 minutes), and far outshines that of the Samsung Galaxy A52 5G (1 hour 49 minutes).

Oppo A94 5GSamsung Galaxy A52 5GXiaomi Redmi Note 10 Pro
Autonomy boost (hh:mm)20%4:331:494:37
40%4:291:514:04
60%3:531:544:04
80%2:201:582:59
Percentage boost20%11.4 %5.1 %9.4 %
40%11.3 %5.2 %8.3 %
60%9.8 %5.4 %8.3 %
80%5.9 %5.6 %6.1 %
Energy consumed20%2501 mWh1235 mWh2504 mWh
40%2464 mWh1260 mWh2201 mWh
60%2135 mWh1293 mWh2201 mWh
80%1284 mWh1346 mWh1618 mWh

Efficiency (94)

Our Efficiency score comprises two sub-scores, Charge up and Discharge. Charge up is the efficiency of a full charge (how much energy is drained from the wall outlet vs the energy capacity of the battery, as well as the efficiency of the charger and its residual consumption). Discharge is how much current the smartphone drains from the battery when in use (the ratio of battery capacity over autonomy). Better autonomy with a smaller battery means better efficiency.

The Oppo A94 5G showed excellent performance in efficiency — third best in our database to date.

Oppo A94 5G Battery review: Good discharge efficiency 35

Charge up

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (82)

Although its adapter efficiency is not quite as good as its competitors’, the entire charging system of the Oppo A94 5G is nevertheless more efficient than either the Samsung Galaxy A52 5G or the Xiaomi Redmi Note 10 Pro.

Oppo A94 5G Battery review: Good discharge efficiency 36

Discharge

Apple iPhone 12 mini

Best: Apple iPhone 12 mini (121)

Oppo A94 5G Battery review: Good discharge efficiency 37

The Oppo A94 5G’s discharge was well-controlled when streaming and playing back video.

The Oppo A94 5G has very well-controlled consumption in most use cases, with its performance when streaming video (both via 4G and WiFi) as well as when playing back videos being particularly good. That said, it consumes more power at night than its rivals, and uses more power than the Samsung Galaxy A52 5G when making 3G phone calls.

Conclusion

With the exception of certain specific use cases such as 3G calling and music streaming, the Oppo A94 5G has considerably better discharge efficiency than its rivals. Its charging time is good, and while it doesn’t reach the highest spot for autonomy, the Oppo device’s duration of 2 days and 10 hours with moderate use seats it comfortably in the top half of our database thus far, despite a smaller battery capacity.

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In the lead for discharge efficiency

In the lead for discharge efficiency

Apple introduced the iPhone 12 mini in October 2020. With a price that places it in our Premium segment ($600-799), the iPhone 12 mini, despite its diminutive size, comes packed with such features as a high-resolution Super Retina XDR display and a dual-camera setup. Our Battery protocol engineers recently tested the Apple iPhone 12 mini; we report their key findings below.

Key specifications:

  • Battery capacity: 2227 mAh
  • 20W charger (not included)
  • Chipset: A14 Bionic
  • 5.4-inch, 2340 x 1080 (476 ppi), 60 Hz OLED display
  • Tested RAM / storage combination: 4 GB / 128 GB
  • Supports wireless charging (12W)

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

In the lead for discharge efficiency 38Apple iPhone 12 mini

In the lead for discharge efficiency 39

59

battery

Pros

  • Battery discharge is extremely efficient, thanks to excellent software optimization.
  • Supports wireless charging that is comparable to wired charging.

Cons

  • Battery size is very small (2227 mAh), which severely impacts autonomy.
  • Despite being able to use a 20W charger, the device’s battery is slow to charge.

The Apple iPhone 12 mini is aptly named, given its overall dimensions — and also given its battery capacity, which at 2227 mAh is far and away the smallest in our entire Battery database as of this writing. However, even though its battery size has a significant impact on its autonomy, its overall Battery score of 59 puts it ahead of several other devices with much larger batteries.

We compared the Apple iPhone 12 mini’s performance in several key categories with another Premium device, the Google Pixel 5, and with a smartphone from our High-End ($400-599) segment, the OnePlus 8T; battery capacity, charger, display type and resolution, and processor specifications for all three devices are shown in the table below.

Apple iPhone 12 miniGoogle Pixel 5OnePlus 8T
Battery capacity (mAh)222740804500
Charger20W18W65W
Wireless12W12WNo
Display typeOLEDOLEDOLED
Resolution, max refresh rate2340 x 1080, 60 Hz2340 x 1080, 90 Hz2400 x 1080, 120 Hz
ProcessorA14 Bionic (5 nm)Qualcomm Snapdragon 765G (7 nm)Qualcomm Snapdragon 865 (7 nm)

How long a battery charge lasts depends not only on battery capacity, but also other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.

Autonomy (41)

Light Usage

57h

Light

Active: 2h30/day

Moderate Usage

40h

Moderate

Active: 4h/day

Intense Usage

25h

Intense

Active: 7h/day

Put bluntly, at this writing, the Apple iPhone 12 mini’s overall Autonomy score of 41 is very close to last place in our database, with the stark difference between its battery capacity (2227 mAh) and that of the Google Pixel 5 (4080 mAh) and the OnePlus 8T (4500 mAh) making it hard to compete with them.

It is worth noting that when the iPhone 12 mini’s battery indicator says 10%, it really does mean 10%, so users won’t experience a precipitous drop in time left as the phone heads towards empty. (This is good behavior that quite a number of other phones don’t exhibit.)

Now let’s take a closer look how the mini’s battery fared in our autonomy tests.

In the lead for discharge efficiency 41

Stationary

Wiko Power U30

Best: Wiko Power U30 (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

Despite the difference in battery capacity, the Apple iPhone 12 mini is not too terribly behind the comparison devices, with its moderate-use autonomy only about 4 hours less than the Google and OnePlus devices. The graph below shows how the Apple iPhone 12 mini’ and its rivals performed in our robot-driven typical usage scenario:

Typical Usage Scenario discharge curves

In the lead for discharge efficiency 42

On the go

Samsung Galaxy M51

Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

At 51 points, the Apple iPhone 12 mini’s on the go performance is similar to that of the Pixel 5 (also 51 points), with both devices significantly behind the OnePlus (61 points). As for individual use cases, the OnePlus leaves both the Apple and Google devices in the dust when it comes to 3G calling, though the two come a bit closer to the OnePlus in  both camera and GPS (and the Google almost matches the OnePlus’s performance for social apps).

Estimated autonomy for on the go use cases (full charge)

In the lead for discharge efficiency 43

Calibrated

Samsung Galaxy M51

Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to specific sets of activities (use cases) such as gaming, streaming, etc.

When the Apple iPhone 12 mini is not in its default auto mode, but rather in calibrated mode (screen at 200 nits and speaker at 60 db), it simply cannot compete with its review rivals and comes in behind them both in all tests. That said, it is worth noting that Apple claims the mini will provide 10 hours of video streaming autonomy, and indeed, when averaged out, the iPhone surpasses that number in calibrated mode, reaching 13 hours of streaming via WiFi and 8 hours 30 minutes via 4G.

Estimated autonomy for calibrated use cases (full charge)

Charging (73)

The DXOMARK Battery charging score is composed of two sub-scores, charging speed and quick power boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from 0% to 80% capacity and from 80% to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired

Wired

Wireless

Wireless

The Apple iPhone 12 mini put in a slightly below-average charging performance. With such a small battery and a 20W charger, it would not unreasonable to expect the iPhone to charge fairly quickly; instead, its performance was similar to that of the Google Pixel 5 with its 4080 mAh battery and 18W charger.

In the lead for discharge efficiency 44

Full charge

Oppo Find X3 Pro

Best: Oppo Find X3 Pro (104)

Power consumption and battery level during full charge

Though the iPhone 12 mini took twice as long as the OnePlus 8T to go from empty to an 80% charge (nearly 52 minutes vs. 25 minutes), the Apple device beat the Google, which took 1 hour 14 minutes to arrive at 80%. Further, although the iPhone took longer than both the Google and the OnePlus to go from 80% to an indicated 100%, and longer than the OnePlus to go from 100% to completely full, the Apple device soundly beat the Pixel 5 when going from 100% to completely full.

As for wireless charging, at 12W, it takes the iPhone 12 Mini 1 hour and 36 minutes to reach 80% (vs. 52 minutes for wired charging) — which all in all is not bad.

In the lead for discharge efficiency 45

Quick boost

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (95)

How much power the Apple iPhone 12 mini has left has an impact on how much additional autonomy a user will get from plugging the device in for five minutes. Plugged in with 20% left, the Apple gets more than twice as much time as when plugged in with 80% power remaining. While these results are similar to those for the Google Pixel 5, the OnePlus 8T provides approximately twice as much additional autonomy across the board than the other two devices for a five-minute charge.

Apple iPhone 12 miniGoogle Pixel 5OnePlus 8T
Autonomy boost (hh:mm)20%2:432:165:42
40%2:312:165:17
60%1:531:464:22
80%1:201:132:30
Percentage boost20%9.5 %6.9 %17.9 %
40%8.8 %6.9 %16.6 %
60%6.6 %5.4 %13.7 %
80%4.7 %3.7 %7.8 %
Energy consumed20%1205 mWh1654 mWh3847 mWh
40%1119 mWh1656 mWh3565 mWh
60%838 mWh1294 mWh2941 mWh
80%591 mWh894 mWh1685 mWh

Efficiency (100)

The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge, both of which combine data obtained during robot-based typical usage scenario testing, outdoor mobility testing, charging evaluation, and power measurements, and then take into consideration the device’s battery capacity.

While its measured times for autonomy cannot compete with most devices with larger batteries, it is nonetheless true that when taking into account its small battery size, the Apple iPhone 12 mini shows good autonomy (which translates here as excellent discharge efficiency).

In the lead for discharge efficiency 46

Charge up

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (82)

While the Apple iPhone 12 mini’s charging efficiency of 68% just tops that of the Google Pixel 5 (66%), it is rather a ways behind that of the OnePlus 8T (81%). Again, its low score here is attributable to its unexpectedly inefficient charger.

In the lead for discharge efficiency 47

Discharge

The Apple iPhone 12 mini put in what our engineers described as an “amazing performance” in all discharge tests except in 3G calling. In default mode, the amount of current it discharges is close to only half of the amount discharged by its rivals, attesting to its being a well-designed smartphone and earning it the top score in our database for this sub-attribute so far.

Conclusion

The Apple iPhone 12 mini is a very well-designed smartphone, with very effective software optimization that makes its battery the current leader in discharge efficiency across our entire database to date. That said, its very small battery does translate into significantly shorter autonomy than nearly all other devices tested thus far.

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Oppo A54 5G Battery review: Very good efficiency

Oppo A54 5G Battery review: Very good efficiency

Arriving on the market in April 2021, the Oppo A54 5G is the latest addition to our Battery database’s Advanced ($200-$399) segment of smartphones. It comes with a 6.5-inch LCD display, a 48 MP main and 8 MP ultra-wide cameras (along with 2 MP depth-sensing and macro sensors). Our team of Battery experts recently tested the A54 5G, and here is a summary of what they found.

Key specifications:

  • Battery capacity: 5000 mAh
  • 10W charger included
  • 6.5-inch, 1080 x 2400, 90 Hz IPS LCD display
  • Qualcomm Snapdragon 480 5G (8 nm) chipset
  • RAM + internal storage: 4 GB + 64 GB

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

Pros

  • Provides more than 2.5 days (65 hours) of autonomy with moderate use
  • Excellent performance for social apps on the go
  • Considerably lower consumption than competition for music streaming in 4G
  • Very good efficiency score thanks to low discharge current for all use cases

Cons

  • Very slow charging, slightly below its competitors
  • High consumption for video playback in 4G

The Oppo A54 5G put in a very respectable performance in our comprehensive Battery protocol tests, firmly positioned in the upper half of all devices tested thus far. Although some of its individual scores came in below those of the competitors in this review, its overall performance was quite balanced among all three principal attributes of autonomy, charging, and efficiency. That said, given the A54 5G’s small 10W charger, it is unsurprising that charging is its biggest weakness.

The table below shows the battery capacity; charger; display type, refresh rate, and resolution; and processor specifications for the Oppo A54 5G, the Vivo Y20s from our Essentials (under $200) segment, and the Motorola Moto G9 Power (Advanced segment):

Oppo A54 5G

Vivo Y20s

Motorola Moto G9 Power

Battery (mAh)

5000

5000

6000

Charger (W)

10W

18W

20W

Display type, refresh rate

IPS LCD, 90 Hz

IPS LCD, 60 Hz

IPS LCD, 60 Hz

Resolution

1080 x 2400

720 x 1600

720 x 1640

Processor

Qualcomm Snapdragon 480 5G (8 nm)

Qualcomm Snapdragon 460 (11 nm)

Qualcomm Snapdragon 662 (11 nm)

Autonomy (80)

How long a battery charge lasts depends not only on battery capacity, but also other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.

Light Usage

93h

Light

Active: 2h30/day

Moderate Usage

65h

Moderate

Active: 4h/day

Intense Usage

41h

Intense

Active: 7h/day

Posting an above-average overall score, the Oppo A54 5G is not too far away from the 3-day mark when it comes to autonomy in moderate use. Let’s take a closer look.

Oppo A54 5G Battery review: Very good efficiency 48

Stationary

Wiko Power U30

Best: Wiko Power U30 (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

The Oppo A54 5G provides some 65 hours when it comes to autonomy in moderate use, and it is even closer to the three-day mark in our TUS testing, lasting over 69 hours. While that is some two hours less than the Vivo Y20s, it is more than two hours than the Motorola Moto G9 Power (which has a much larger battery).

Both the A54 5G and the Moto G9 Power consume an average of 2.33% battery level per night, which is much more than the Vivo Y20s’s very good 1%.

Typical Usage Scenario discharge curves

Oppo A54 5G Battery review: Very good efficiency 49

On the go

Samsung Galaxy M51

Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

On the go, the A54 5G battery does well with GPS navigation and social apps — either bettering or coming very close to the competition. That said, it lags a bit behind both the Vivo and Motorola devices for calling.

Estimated autonomy for on the go use cases (full charge)

Oppo A54 5G Battery review: Very good efficiency 50

Calibrated

Samsung Galaxy M51

Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

Back in the cage, the Oppo devices outlasts its competitors in many use cases, ending up with a global score that is quite a bit ahead of the Vivo Y20s’s, though only just two points above Moto G9 Power’s. Looking  more closely, the A54 5G is way ahead of both rivals for 4G music streaming; and it is neck-and-neck with the Vivo for 4G video streaming (though the Moto G9 Power outlasts them both). However, when it comes to 3G calling, neither the Oppo nor the Vivo’s duration (under 30 hours) comes close to the Motorola device’s longevity of more than 60 hours (which is the best result for this sub-category across our entire database thus far).

Estimated autonomy for calibrated use cases (full charge)

Linearity

When the Oppo A54 5G’s gauge shows 20% remaining, our tests indicate that its true remaining capacity is 17.2%, which is just slightly below that of the Vivo (17.7%) and the Motorola (17.6%) — and among all devices tested thus far, the percentages for these three are just about average.

Charging (55)

The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from 0% to 80% capacity and from 80% to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired

Wired

Given its small charger, it comes as no surprise that the Oppo A54 5G turns in a poor score for charging. (As per our protocol, we tested it with the 10W charger included in the box, but our engineers point out that the A54 5G could use a 18W charger, which would undoubtedly improve its results.) This said, the size of the charger is not the only factor, as the Motorola device comes with a 20W charger and has a similarly poor 0-80% charging time (even taking into account its larger battery).

Power consumption and battery level during full charge

Oppo A54 5G Battery review: Very good efficiency 51

Full charge

Oppo Find X3 Pro

Best: Oppo Find X3 Pro (104)

The Oppo A54 5G’s total charging time from 0% to 100% battery capacity is 2 hours 59 minutes, which is 31 minutes slower than Vivo Y20s, but only 6 minutes slower than the Motorola Moto G9 Power. Of this total time, the Oppo takes 1 hour 51 minutes to get to 80%, taking an additional 59 more minutes to arrive at 100% per its gauge. While that is on the long side, it’s worth noting that its gauge is quite accurate, as it takes only 9 more minutes to go from 100% showing to being completely full (99% accuracy).

Oppo A54 5G Battery review: Very good efficiency 52

Quick boost

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (95)

Again attributable to its small charger, the Oppo’s results in our quick boost testing were disappointing but not unexpected: plugging in the A54 5G smartphone for 5 minutes at less than 50% battery level, users will be able to gain 1 hour 50 minutes of autonomy (which is one hour less than the Vivo Y20s, though only ten minutes less than the Motorola Moto G9 Power).

The Oppo takes 1 minute 52 seconds to gain 1% battery level while gaming at low battery, which is only 17 seconds slower than Motorola — again underscoring the fact that a charger’s size is not the only factor involved in charging efficiency.

Oppo A54 5GVivo Y20sMotorola Moto G9 Power
Autonomy boost (hh:mm)20%1:502:451:51
40%1:492:362:00
60%1:472:322:03
80%1:451:452:06
Percentage boost20%3.7 %5.5 %4 %
40%3.7 %5.2 %4.3 %
60%3.7 %5.1 %4.4 %
80%3.6 %3.5 %4.6 %
Energy consumed20%1012 mWh1508 mWh1452 mWh
40%1004 mWh1425 mWh1561 mWh
60%992 mWh1387 mWh1601 mWh
80%971 mWh962 mWh1641 mWh

Efficiency (88)

Our Efficiency score comprises two sub-scores, Charge up and Discharge. Charge up is the efficiency of a full charge (how much energy is drained from the wall outlet vs the energy capacity of the battery, as well as the efficiency of the charger and its residual consumption). Discharge is how much current the smartphone drains from the battery when in use (the ratio of battery capacity over autonomy). Better autonomy with a smaller battery means better efficiency.

Oppo A54 5G Battery review: Very good efficiency 53

Charge up

Oppo Find X3 Neo

Best: Oppo Find X3 Neo (82)

At 71.5%, the Oppo A54 5G’s entire charging system (including charge adapter and internal smartphone circuits) is more efficient than the Motorola Moto G9 Power (64.5%) and just a shade ahead of the Vivo Y20s (70.9%).

Oppo A54 5G Battery review: Very good efficiency 54

Discharge

Apple iPhone 12 Pro Max

Best: Apple iPhone 12 Pro Max (116)

The Oppo A54 5G’s discharge efficiency performance is very good compared to many other devices in our database as a whole, and its score of 99 handily beats out both the Vivo Y20s (74) and especially the Motorola Moto G9 Power (50) here. In fact, it does better than both devices in every sub-category, with the exception of 3G calling: in that instance, just as in our on-the-go tests, the Motorola device shows significantly better battery performance than its two rival devices in this comparison.

Conclusion

Oppo A54 5G has a higher Efficiency score than its Vivo and Motorola competitors (and many other devices as well), and a decent score for Autonomy. However, its small charger (and resulting slow charging times across the board) holds it back from achieving a better overall score.

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