• Daniel Chaparro

Samsung Galaxy S21 ViserMark Battery Life

Updated: Apr 7

Battery Life Testing Report – March 2021


As the new member of the S family, the Samsung Galaxy S21 will be recognised in 2021. Samsung has chosen to remove some specs when comparing with the S20 from the previous year to gain in price competitiveness.

There is also the S21 Plus option if you are looking for a larger screen and the S21 Plus Ultra for those who are looking the best from Samsung.

Release Date January 2021

Product Features and Specification

  • Design: Plastic design with metal rails that flow into the camera bump on the back.

  • Front Camera: 10 MP Front camera, f/2.2, 26 mm, 1/3.24”, 1,2µm, Dual Pixel, PDAF

  • Rear Camera: Wide (main)12 MP, f/1.8, 26 mm 1/1.76", 1.8µm, Dual Pixel PDAF, OIS.

Ultra-wide angle: 12, f/2.2, 123˚, 13mm, 1/2.55", 1.4µm; Super Steady video.

Telephoto: 64 MP, f/2.0, 29mm, 1/1.72", 0.8µm, PDAF, OIS, 1.1x optical zoom, 3x hybrid zoom.

  • Video capture: Rear camera: 8K@24fps,4k@30/60fps, 1080p@30/60/240fps; Front camera: 4K@30/60fps, 1080p@3pfps

  • Battery: 4000 mAh (25W fast charge, 15W fast wireless charge, 4.5W reverse wireless charge, USB Power Delivery 3.0)

  • Display: 6.2"

  • Size: 151.7 x 71.2 x 7.9mm

  • Weight: 169g

  • Memory: 128/256GB 8GB RAM. UFS 3.1

  • Chipset: Exynos 2100 (5 nm)

  • Android: Android 11, One UI 3.1

  • Software Version: RP1A.200720.012.G991BXXU1AUB8

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The Samsung Galaxy S21 is classed as a flagship device (around 800 EURO) in ViserMark list. The S21 comes with the Exynos 2100 for the international market and the Snapdragon 888 for USA/China. The Exynos version was the one used during our tests; it offers 5G connectivity.

The S21 is powered by a 4000mAh battery; a 25W fast charge, 15W wireless fast charge and 4.5W reverse charge option are included.

Testing Results

Through the ViserMark test protocol, the S21 battery lasts around 37 hours with a display refreshing rate of 120 Hz and 38.5 hours with 60Hz obtaining a 178 ViserMark score, this score is an average between 120Hz and 60Hz tests. Compared with the average ViserMark score of flagship devices “182.85” the S21 offers a slightly lower autonomy.

Test Graphics


The battery autonomy of the Samsung Galaxy S21 is around`1.5 days based on the ViserMark testing protocol. It is lower than its predecessor, the S20 (2 days), however, the S21 has a smaller battery (500mAh less). Also, compared to other flagship devices, the S21 performance is similar. Pixel 4XL (182), Oppo X2 Pro (183).

ViserMark tests are performed with the strictest protocol in a controlled environment to ensure repetition and consistency powered and automated by SmartViser’s test automation solution viSer. The automation test includes a variety of user actions from calls to social media and periods of standby times.

VCX (Valued Camera eXperience)

The VCX Forum has been working with its members on the system and infrastructure as a non-profit organisation. We strive to improve our technology to develop and exchange accurate and objective quality and performance indicators that are our ultimate goal. We will also serve as a compass for the smart-phone camera industry. We appreciate your interest in VCX-Forum.

Samsung Galaxy S21

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The Samsung Group is a South Korean multinational conglomerate headquartered in Samsung Town, Seoul. It comprises numerous affiliated businesses, most of them united under the Samsung brand. Samsung Electronics has assembly plants and sales networks in 74 countries and employs around 290,000 people. Samsung is a major manufacturer of electronic components such as lithium-ion batteries, semiconductors, image sensors, camera modules and displays for clients such as Apple, Sony, HTC and Nokia.

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Not only is ViserMark the first label that measures battery performance, translating mAh into direct battery life scores, but it is also a highly valuable marketing asset to device manufacturers and end-users. ViserMark is a benchmark to help make better-informed choices when buying a Smartphone. 

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