SM-G991B · 2 versions · 16,924 samples
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
exynos2100
Memory options
8/256 GB · 8/128 GB
Display
1080x2400 (60Hz)
Model
SM-G991B
Android versions
15 Vanilla Ice Cream · 14 Upside Down Cake · 11 R
Battery
4000 mAh
Technology
Li-Ion
Chipset
exynos2100
Memory options
8/256 GB · 8/128 GB
Display
1080x2400 (120Hz)
Model
SM-G991B
Estimated charging time
5h 0min
to charge 0 → 100%
Max charging temperature
46.2°C
average peak while charging
Screen-on time
5h 30min
estimated on a full charge
Estimated battery life
10h 30min
estimated on a full charge
See your own charging speed, screen-on time and battery health in real time with Battery Guru.
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The Samsung Galaxy S21 5G packs a 4000 mAh Li-Ion battery and lasts about 10h 30min on a full charge with around 5h 30min of screen-on time. It charges from 0 to 100% in roughly 5h 0min, peaking near 46.2°C while charging. Every figure is aggregated anonymously from real Galaxy S21 5G owners using Battery Guru (8 samples), so it reflects everyday usage rather than lab claims.
Based on 8 anonymized samples from Battery Guru.
Aggregated Battery Guru data shows the Samsung Galaxy S21 5G lasts about 10h 30min on a full charge, with roughly 5h 30min of screen-on time.
The Galaxy S21 5G charges from 0 to 100% in approximately 5h 0min, with charging temperatures peaking around 46.2°C.
The Galaxy S21 5G has a 4000 mAh Li-Ion battery.
It is aggregated anonymously from real Galaxy S21 5G owners using the Battery Guru app (8 samples), reflecting real-world usage rather than manufacturer specifications.