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Samsung Galaxy M51 - Smartphone Battery Performance

Updated: Nov 10, 2023

The Samsung Galaxy M51 - The Best Smartphone in the M Series


Battery Capacity mAh: 7000

Samsung Galaxy M51 smartphone

Smartphone Battery Performance: Ranking #5

Placed No. 2 Smartphone for Battery Performance within the Mid Tier Ranking Table


Battery Performance Testing and Review – July 2021

ViserMark Label for battery performance for the Samsung Galaxy M51 62/100


The Samsung Galaxy M51 was the first Samsung device powered by a 7000mAh battery from the M family. The M51 is the most expensive device from its family, completing the massive battery. It has a Super AMOLED panel and a Snapdragon Chipset.


Release Date: August 2020

Product Features and Specification

  • · Design: Classic and resistant design.

  • · Rear Camera: 64 MP, f/1.8, 26mm (Wide), 1/1.73”, 0.8 µm, PDAF

12 MP, f/2.2, 123° (Ultrawide angle)

5 MP, f/2.4. (Macro)

5 MP, f/2.4, (Depth)

  • · Video: 4K@30fps, 1080@30fps.

  • · Selfie Camera: 32 MP, f/2.0, 26mm (Wide), 1/2.8”, 0.8 µm.

  • · Video: 4k@30fps, 1080@30fps.

  • · Battery: 7000 mAh (25W fast charge, 100% in 115 mins (advertised).

  • · Display: 6.7" Super AMOLED Plus.

  • · Size: 163.9 mm x 76.3 mm x 9.5 mm.

  • · Weight: 213g.

  • · Memory: 128GB ROM, 8/6GB RAM, Micro SDXC (dedicated slot).

  • · Chipset: Qualcomm SDM730 Snapdragon 730G (8 nm): Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver); Adreno 618.

  • · Android: Android 10, One UI 2.5.


Battery Performance


With a price of around 400 EURO, the Samsung Galaxy M51 is a Mid-Tier smartphone in the ViserMark ranking (Smartphones priced between 200-500 EURO). The Qualcomm SMD 730G Snapdragon 730G orchestrate the smartphone.

A 7000mAh battery powers the M51 to assure high autonomy. Compared with other Mid-tier devices, a higher refresh rate is a missing feature in the M51 that allows 60 Hz.

ViserMark Label for battery performance indicating 62/100

The overall Battery Performance Score is now a global score taking calculations from Battery Life, Power Efficiency and Charging Times.

We have given this Smartphone a ViserMark score of 62 based on the results. The Battery Performance Label, being nearer 100, indicates that it is one of the best-performing and has been ranked 5th among the best Battery Performance Smartphones tested by SmartViser. The M51 additionally stands on the podium of Mid-Tier device's battery performance, ranking just behind the Wiko View 5 Plus.


Testing Results

ViserMark Label for battery life indicating 3.5 Days of Use

BATTERY LIFE - Days of Use

The Samsung Galaxy M51 reached 82 hours of autonomy through the ViserMark test protocol with a 60 Hz refreshing rate, obtaining a Battery Life score of 3.5 Days of Use.

A Mid Tier device's average Day of Use ViserMark score is “2” Days. The M51 score places the Smartphone at the Top of the ViserMark Mid-Tier ranking regarding autonomy, sharing the first position with the Wiko View 5 plus.

ViserMark Label for battery charging indicating 1h47

CHARGING TIME - Hours and Minutes

The charging time to 100% was one hour and forty-seven minutes, with the 25W fast charge option included. This value is even 8 minutes slower than the 115 minutes advertised by Samsung.

The average Charging Time is 1:36 for a Smartphone within the ViserMark Mid-Tier. This score places the M51 in the middle of the charging time ranking, and a higher power charger could be an option to get a faster charge, considering the device’s battery size.

Smartphone charging time icon

  • Currently, in the middle of the Smartphones with the Best Charging Times


Test Graphics

Our testing is based on smartphone usage from 100% battery level down to Power Off. When testing Smartphones, the testing protocol includes everyday life activities, for instance, Calls, Web, Video and Music streaming, Gaming, Social networks, Picture and video capture and standby.

All testing is performed under strictly controlled test conditions and executed in a defined order and timeline.

Figure 1. ViserMark Battery Life Test at 60 Hz refresh rate

A chart for battery performance with test results for the Samsung Galaxy M51 smartphone
Wiko Power U20 Test Graphics
SmartViser Logo
ViserMark Label for battery efficiency indicating 1.5/5 leaves

Several power-efficient smartphone processors can cope with the growing number of new applications and support high-resolution displays without compromising battery life.

Power Efficiency is calculated using Battery Life and Battery Capacity. This is expressed in “Leaves" and reflects a rating between 1 being the least and 5 being the most power-efficient.

The Samsung Galaxy M51 achieved an overall Power Efficiency Score of 1.5, placing the device in the middle of the ViserMark ranking in terms of Power Efficiency.



With an overall Battery Performance Score of 62, the Samsung Galaxy M51 has reached 5th in ViserMark ranking for being the best Smartphone with the Best Battery Performance.

Compared with other Mid-Tier Smartphones, the M51 performance is just behind the Wiko View 5 Plus but superior to all other Mid-tier devices in the ViserMark ranking. It is an expected result regarding autonomy, as the M51 has the largest battery in the ViserMark list.

In conclusion, the Samsung Galaxy M51 guarantees high autonomy, given its 7000mAh battery. There are still points of improvement in battery efficiency and charging time that could place a device of the same family on top of the ViserMark battery performance ranking.


ViserMark tests are performed with the strictest protocol in a controlled environment to ensure repetition and consistency. They are 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.

A button for the Samsung Galaxy M51 smartphone specifications

VCX (Valued Camera eXperience) - not available at present.

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, which is our ultimate goal. We will also serve as a compass for the smartphone camera industry. We appreciate your interest in VCX-Forum.



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The Samsung Group is a South Korean multinational conglomerate headquartered in Samsung Town, Seoul. It comprises numerous affiliated businesses, most 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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If you're looking for the best smartphone on the market, battery performance is one of the critical, decisive aspects. Please review the ViserMark comprehensive database of testing results.

Not only is ViserMark the first label that measures battery performance, translating mAh into direct battery life scores, but it is also a precious 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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3 comentários

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Nirmal Singh
Nirmal Singh
16 de set. de 2023
Avaliado com 5 de 5 estrelas.

Best mobile phone M51


Naeem Kallu
Naeem Kallu
15 de out. de 2022

بھائی یہ موبائل M 51 samsungہے

umesh fartale
umesh fartale
08 de nov. de 2023
Respondendo a

nko mobile 📱 samsung galaxy m51 mobile no 📵

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