Battery Life + Recharging, Performance

Xiaomi Redmi 9T : Battery Life

The Xiaomi Redmi 9T comes with a massive 6,000 mAh battery.

To test its battery life, we turned off Automatic Brightness, and set its display brightness to 50%.

Why 50%? That is actually slightly higher than the average indoor brightness level of 40% during the day, and is what we usually use in all our mobile battery life tests.

It is important to fix the brightness level, to make sure the screen brightness does not change as the ambient brightness changes.

We then ran the PCMark Work 2.0 battery life test until its battery capacity dropped to 20% several times, and this was the best result we obtained :

Work 2.0	Redmi 9T	Black Shark 2 Pro	Galaxy S20 Ultra	Galaxy Note10+	Note20 Ultra
Battery Capacity	6,000 mAh	4,000 mAh	5,000 mAh	4,300 mAh	4,500 mAh
Battery Life	19 hrs 50 mins	12 hrs 25 mins	11 hrs 32 mins	10 hrs 32 mins	10 hrs 9 mins
Battery Utilisation (per min.)	4.03 mAh	4.30 mAh	5.78 mAh	5.44 mAh	5.91 mAh
Review Links		Review	Review	Review	Review
Price Check	US Malaysia Singapore Australia	UK Malaysia Singapore Australia	US UK Malaysia Singapore Australia	US UK Malaysia	US UK Malaysia Singapore Australia

Will you look at that? Almost 20 hours of battery life, and this was based on running work apps non-stop!

This is incredibly long battery life – almost twice as long as the Galaxy Note20 Ultra!

 

Xiaomi Redmi 9T : Recharging Speed

Take a look at how fast it recharges its 6,000 mAh battery.

	Galaxy S20 Ultra	Galaxy Note10+	Note20 Ultra	Black Shark 2 Pro	Redmi 9T
Battery Capacity	5,000 mAh	4,300 mAh	4,500 mAh	4,000 mAh	6,000 mAh
Charger Output	25 watts	25 watts	25 watts	27 watts	18 watts
Recharging Time	57.5 mins	63 mins	66.5 mins	67 mins	184 mins
Recharging Speed (per minute)	69.6 mAh	54.6 mAh	54.1 mAh	47.8 mAh	26.1 mAh
Review Links	Review	Review	Review	Review
Price Check	US UK Malaysia Singapore Australia	US UK Malaysia	US UK Malaysia Singapore Australia	UK Malaysia Singapore Australia	US UK Malaysia Singapore Australia

The Xiaomi Redmi 9T may support 18 W charging, and even comes with a 22.5 watt fast charger, but it sure is slow at charging.

It takes over 3 hours to fully recharge its 6,000 mAh battery from 20% – almost twice as slow as the next slowest smartphone – the Black Shark 2 Pro!

 

Xiaomi Redmi 9T : Work Performance

We tested the Redmi 9T using PCMark, which simulates work applications like web browsing, playing video, writing text and editing photos.

Work 2.0	Note20 Ultra	Galaxy Note10+	BS 2 Pro	Galaxy S10+	Redmi 9T
Mobile Platform	Exynos 990	Exynos 9825	SD 855+	Exynos 9820	SD 662
Performance Score	10523	8981	8384	7846	5986
Web Browsing	8865	8293	6768	8583	5844
Video Editing	6232	9166	5948	5524	3423
Writing	11112	9579	9226	9076	6657
Photo Editing	30789	19376	17595	10710	12031
Data Manipulation	6825	6155	6339	6450	4799

The Qualcomm Snapdragon 662 is a mid-range mobile SoC released in early 2020. So it isn’t surprising to see that it’s only about half as fast as a flagship SoC like the Exynos 990.

Even so, it offers pretty good work performance at this price point. Unless you are comparing smartphones side-by-side, you probably won’t notice the difference.

 

Xiaomi Redmi 9T Gaming Performance : 3DMark

For gaming, we first tested the Redmi 9T using 3DMark, with these results :

3DMark	Note20 Ultra	B Shark 2 Pro	Galaxy Note10+	Galaxy S10+	Redmi 9T
Device	Exynos 990	SD 855+	Exynos 9825	Exynos 9820	SD 662
Sling Shot Extreme (OpenGL)	6642	6258	5037	4470	1174
Sling Shot Extreme (Vulkan)	5722	5386	4794	4314	1098
Sling Shot	8128	8127	4883	4343	1844

Needless to say, the Xiaomi Redmi 9T is no speedy Gonzales, when it comes to games.

On average, it only offers about 20% the gaming performance of a flagship chip like the Exynos 990, which powers the Galaxy Note20.

 

Xiaomi Redmi 9T Overall Performance : AnTuTu

We then tested the Redmi 9T using AnTuTu, yielding these results :

AnTuTu	Note20 Ultra	B Shark 2 Pro	Galaxy Note10+	Galaxy S10+	Redmi 9T
Device	Exynos 990	SD 855+	Exynos 9825	Exynos 9820	SD 662
AnTuTu Score	522735	434168	348397	330549	173559
CPU	146783	126170	101187	100272	64505
GPU	215205	188158	156700	149930	31734
Memory	89376	65052	72051	68188	40377
UX	71371	54788	18459	12159	36943

The Qualcomm Snapdragon 662 has decent CPU and memory performance, but falls short in the graphics department.

It’s good enough for work and the average mobile game. But don’t count on it to push the envelope when it comes to gaming.

Next Page > A Quick Wrap, Verdict + Award

 

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