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DisplayArriving 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
Scoring
Sub-scores and attributes included in the calculations of the global score.
Xiaomi Mi 11 Ultra
Key performances
These key points are derived from the lab measurements during testing and do not figure into the overall score. The lab measurements, however, are used for the overall score.
106th
23rd
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.
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.
Battery Life (moderate)
103rd
Battery Life (moderate)
20th
Stationary
Xiaomi Mi 11 Ultra
55
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%.
On the go
Xiaomi Mi 11 Ultra
57
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.
Calibrated
Xiaomi Mi 11 Ultra
56
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).
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.
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
121
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.
Charging Time 0-80%
40th
Charging Time 0-80%
12th
Quick boost
Xiaomi Mi 11 Ultra
86
111
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 mWh | 4020 mWh | 2282 mWh |
| 40% | 3633 mWh | 4563 mWh | 2285 mWh | |
| 60% | 3007 mWh | 3223 mWh | 1997 mWh | |
| 80% | 2535 mWh | 2360 mWh | 1896 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
105
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
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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