SM-G991B · 8 variants · 5,540 samples
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
exynos2100
Memory
8GB · 128GB
Display
1080x2400 (60Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
lahaina
Memory
8GB · 256GB
Display
1080x2400 (60Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
lahaina
Memory
8GB · 128GB
Display
1080x2400 (120Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
exynos2100
Memory
8GB · 256GB
Display
1080x2400 (60Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
lahaina
Memory
8GB · 256GB
Display
1080x2400 (120Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
lahaina
Memory
8GB · 128GB
Display
1080x2400 (60Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
exynos2100
Memory
8GB · 256GB
Display
1080x2400 (120Hz)
Model
SM-G991B
Android
15 Vanilla Ice Cream
Battery
4000 mAh
Technology
Li-Ion
Chipset
exynos2100
Memory
8GB · 128GB
Display
1080x2400 (120Hz)
Model
SM-G991B
Estimated charging time
3h 0min
to charge 0 → 100%
Max charging temperature
38.8°C
average peak while charging
Screen-on time
6h 0min
estimated on a full charge
Estimated battery life
16h 0min
estimated on a full charge
See your own charging speed, screen-on time and battery health in real time with Battery Guru.
Get Battery GuruSpotted a mistake?
Specs or numbers look off for the Samsung Galaxy S21 5G? Let us know and we'll fix it.
The Samsung Galaxy S21 5G packs a 4000 mAh Li-Ion battery and lasts about 16h 0min on a full charge with around 6h 0min of screen-on time. It charges from 0 to 100% in roughly 3h 0min, peaking near 38.8°C while charging. Every figure is aggregated anonymously from real Galaxy S21 5G owners using Battery Guru (1020 samples), so it reflects everyday usage rather than lab claims.
Based on 1020 anonymized samples from Battery Guru.
Aggregated Battery Guru data shows the Samsung Galaxy S21 5G lasts about 16h 0min on a full charge, with roughly 6h 0min of screen-on time.
The Galaxy S21 5G charges from 0 to 100% in approximately 3h 0min, with charging temperatures peaking around 38.8°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 (1020 samples), reflecting real-world usage rather than manufacturer specifications.