Samsung Galaxy S21 5G

Samsung Galaxy S21 5G
1080 x 2400
(20:9 ratio)


128GB to 256GB

  1. Exynos 2100
  2. Qualcomm SM8350 Snapdragon 888 5G

4000 mAh
14.8 Wh

 ~93 h
 ~20 h
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Samsung Galaxy S21 5G was released in 2021 and is powered by the Exynos 2100 chipset manufactured on a 5 nm process technology, or by the Qualcomm SM8350 Snapdragon 888 5G chipset manufactured on a 5 nm process technology. It comes with 8GB of RAM and 128GB to 256GB of storage. The battery capacity is 4000 mAh and the phone is 7.9 mm thick.

Samsung Galaxy S21 5G Battery life (for both versions)

Samsung Galaxy S21 5G battery life can vary significantly, ranging from 9 hours and 55 minutes to 93 hours, depending on how the phone is used. The following usage profiles are relevant:

1.  Active Standby: ~93 hours

3 days and 21 hours? Really? This profile prioritizes a phone that's always reliable, perfect for emergencies or extended trips. Keep in mind, standby time will take a significant hit when you actually use the phone. Active standby time of the Samsung Galaxy S21 5G depends on using it wisely and avoiding battery-draining background apps.

2.  Light Usage Profile: ~42 hours

If you primarily use your phone for communication but have all the apps you need and use them whenever you need them, you can expect the Samsung Galaxy S21 5G to last for approximately 42 hours. That means 1 day and 18 hours.

3.  Moderate Usage Profile: ~32 hours

If you're a fan of YouTube and social media but don't have all day for it, this profile is for you. In this scenario, you can expect the phone to last for approximately 32 hours. That means 1 day and 8 hours.

4.  Heavy Usage Profile: ~21 hours

If you have high communication needs and staying informed is crucial for you, you will likely use your phone heavily. In this scenario, you can expect a battery life of approximately 21 hours.

Within this category, there are three extreme subprofiles:

  • Continuous voice calls: ~20 hours.
  • Continuous video playback: ~13 hours and 32 minutes.
  • Continuous intense web activity: ~9 hours and 55 minutes.

It is important to note that these are just estimates, and actual battery life may vary depending on individual usage patterns and specific conditions.

Factors such as battery age, screen brightness, network signal strength, and background app activity can also impact battery life of Samsung Galaxy S21 5G phone.

Basic specifications

General specifications
Release year 2021
Networks technology GSM / CDMA / HSPA / EVDO / LTE / 5G (2G+3G+4G+5G)
Size (mm) 151.7 x 71.2 x 7.9 mm
Size (in) 5.97 x 2.80 x 0.31 in
Weight 169 g
Software Android 11, upgradable to Android 14, One UI 6
Screen size 6.2 inches
Screen resolution 1080 x 2400 pixels (20:9 ratio)
Screen Type Dynamic AMOLED 2X, 120Hz
  1. Exynos 2100
  2. Qualcomm SM8350 Snapdragon 888 5G
  1. Octa-core (1×2.9 GHz Cortex-X1 + 3×2.80 GHz Cortex-A78 + 4×2.2 GHz Cortex-A55) – International
  2. Octa-core (1×2.84 GHz Cortex-X1 + 3×2.42 GHz Cortex-A78 + 4×1.80 GHz Cortex-A55) – USA/China
  1. Mali-G78 MP14 – International
  2. Adreno 660 – USA/China
Technology 5 nm process
Storage 128GB to 256GB
Memory versions
  • 128GB storage, 8GB RAM
  • 256GB storage, 8GB RAM
Card No
Multimedia & Connectivity
Main Camera Triple (12MP + 64MP + 12MP)
Front Camera Single (10 MP)
Radio FM radio (version dependent)
USB USB Type-C 3.2, OTG
Jack 3.5mm No
Battery Type Non-removable Li-Ion
Battery Capacity 4000 mAh
Battery Energy 14.8 Wh
Phone Power density 23.67 mAh/g weight
506.33 mAh/mm thickness
Charging 25W wired, PD3.0
15W wireless (Qi/PMA)
4.5W reverse wireless
Battery Life Stand-by time: ~93 h
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