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Xiaomi Mi 11 Ultra Battery review: Fast wireless charging

Reading Time: 5 min read
69
battery
Charging Time
2 days 2h
Battery life
Charging Time
0h28
80% Charging time
Charging Time
0h44
Full charging time

Arriving on the market in March 2021, the Xiaomi Mi 11 Ultra fits in our Ultra-Premium (800€ and higher) segment. Let’s see how well it performed in our Battery protocol tests.

Key specifications:

  • Battery capacity: 5000 mAh
  • 67W charger, 67W wireless
  • 6.81-inch, 1440 x 3200, 120 Hz AMOLED display
  • Qualcomm Snapdragon 888 5G (5 nm) chipset
  • Tested ROM / RAM combination: 256 GB + 12 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

Xiaomi Mi 11 Ultra
69
battery
53
autonomy
96
charging
59
efficiency

Pros

  • More than 2 days of autonomy with moderate use
  • Good charging experience
  • Fastest wireless charging in our database thus far

Cons

  • Very high power consumption in all use cases
  • When 20% shows on gauge, only 15.7% charge remains

The Xiaomi Mi 11 Ultra has the best global score in this comparison with two other devices in our Ultra-Premium segment, the Oppo Find X3 Pro and the Samsung Galaxy S21 Ultra 5G (Exynos); battery capacity, tested charger, display type, and resolution, and processor specifications for all three devices are shown in the table below.

Xiaomi Mi 11 Ultra Oppo Find X3 Pro Samsung Galaxy S21 Ultra 5G (Exynos)
Battery capacity 5000 mAh 4500 mAh 5000 mAh
Charger

Wireless

67W

67W

65W

30W

25W (not included)

15W

Display type AMOLED AMOLED AMOLED
Display resolution 1440 x 3200 1440 x 3216* 1440 x 3200*
Chipset Qualcomm Snapdragon 888 5G 5 nm Qualcomm Snapdragon 888 5G 5 nm Exynos 2100 5 nm

*Note that while the Oppo Find X3 Pro and the Samsung Galaxy S21 Ultra 5G (Exynos) are equipped with QHD display screens, their default UI resolution is FHD only (1080 x 2412 for the Oppo and 1080 x 2400 for the Samsung).

Autonomy (53)

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
72h
Light
Active: 2h30/day
Moderate Usage
50h
Moderate
Active: 4h/day
Intense Usage
31h
Intense
Active: 7h/day

The Xiaomi Mi 11 Ultra showed much better results than its rivals in all our autonomy tests, offering more than 2 days of autonomy with moderate use.

Stationary

Xiaomi Mi 11 Ultra

55

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. 

The Mi 11 Ultra is the clear winner in the autonomy battle during our TUS testing, lasting 56 hours 28 minutes, which is 10 hours more than its rivals. The Xiaomi device lost more than 2% its battery charge during the night, compared to the Find X3 Pro’s 1.5% and the Samsung Galaxy S21 Ultra 5G (Exynos)’s hefty 4%.

Typical Usage Scenario discharge curves

On the go

Xiaomi Mi 11 Ultra

57

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.

Except for GPS, Xiaomi device achieved an average performance in all use cases, but it did well enough in Call to earn a better overall mark in this sub-attribute than its rivals.

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

Calibrated

Xiaomi Mi 11 Ultra

56

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.

Apart from gaming, where it lasted considerably longer than its rivals, the Mi 11 Ultra put in a largely lackluster performance, but still beat the Find X3 Pro and the Galaxy S21 Ultra 5G (Exynos).

Estimated autonomy for calibrated use cases (full charge)

Charging (96)

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
84%
in 30 min
0h28
0 - 80%
0h44
Full charge
Wireless
Wireless
72%
in 30 min
0h34
0 - 80%
1h00
Full charge

The Xiaomi Mi 11 Ultra’s 67W charger lets it outperform the Samsung, but does not quite match the performance of the Oppo Find X3 Pro at 65W.

Full charge

Xiaomi Mi 11 Ultra

99

117

Nubia RedMagic 6 Pro
Best: Nubia RedMagic 6 Pro (117)

Power consumption and battery level during full charge

The Mi 11 Ultra needs only 44 minutes to completely fill its 5000 mAh battery, which is significantly faster than the Samsung, and only 7 minutes behind the Oppo. However, the Mi 11 Ultra is the fastest for wireless charging, requiring only an hour to fully charge its battery — a better performance than either the Find X3 Pro at 1 hour 43 minutes or the Samsung S21 Ultra (Exynos) at 2 hours 32 minutes.

Time to full charge

Quick boost

Xiaomi Mi 11 Ultra

86

109

Xiaomi 11T Pro
Best: Xiaomi 11T Pro (109)

By plugging in the Xiaomi smartphone for 5 minutes, users will gain an average of more than 5 hours of autonomy. These results are comparable to the Oppo’s and better than the Samsung’s.

Xiaomi Mi 11 Ultra Oppo Find X3 Pro Samsung Galaxy S21 Ultra 5G (Exynos)
Autonomy boost (hh:mm) 20%6:08 5:49 3:01
40%5:11 6:36 3:02
60%4:18 4:40 2:39
80%3:37 3:25 2:31
Percentage boost 20%17.4 %18.4 %9.1 %
40%14.7 %20.9 %9.2 %
60%12.2 %14.7 %8 %
80%10.3 %10.8 %7.6 %
Energy consumed 20%4291 mWh4020 mWh2282 mWh
40%3633 mWh4563 mWh2285 mWh
60%3007 mWh3223 mWh1997 mWh
80%2535 mWh2360 mWh1896 mWh

Efficiency (59)

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 Mi 11 Ultra’s performance is below average for efficiency when compared to other ultra-premium devices in our database.

Charge up

Xiaomi Mi 11 Ultra

78

84

Oppo Reno6 Pro 5G
Best: Oppo Reno6 Pro 5G (84)

With its very efficient charger, the Xiaomi Mi 11 Ultra’s charging system is quite efficient overall (78.3%) — better than the S21 Ultra (Exynos) at 77.8%, but a bit behind the Oppo at 79.6%.

Discharge

Xiaomi Mi 11 Ultra

56

121

Apple iPhone 13 Pro
Best: Apple iPhone 13 Pro (121)

With their high-caliber screens and other ultra-premium features, all three devices drain their batteries very quickly, no matter the use case.

Conclusion

With a slightly bigger battery and faster charger than its competitors, the Xiaomi Mi 11 Ultra offers more than 2 days of autonomy with moderate use and a very good charging experience.

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