SM-G991B · 2 versions · 51,231 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 · 11 R
Battery
4000 mAh
Technology
Li-Ion
Chipset
lahaina
Memory options
8/256 GB · 8/128 GB
Display
1080x2400 (120Hz)
Model
SM-G991B
Estimated charging time
3h 30min
to charge 0 → 100%
Max charging temperature
38.2°C
average peak while charging
Screen-on time
5h 0min
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 0min of screen-on time. It charges from 0 to 100% in roughly 3h 30min, peaking near 38.2°C while charging. Every figure is aggregated anonymously from real Galaxy S21 5G owners using Battery Guru (1531 samples), so it reflects everyday usage rather than lab claims.
Based on 1531 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 0min of screen-on time.
The Galaxy S21 5G charges from 0 to 100% in approximately 3h 30min, with charging temperatures peaking around 38.2°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 (1531 samples), reflecting real-world usage rather than manufacturer specifications.