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OnePlus 8 Pro - Battery Performance Score


Battery Capacity mAh: 4510


Smartphone Battery Performance: Ranking #49

In the lower half for Battery Performance within the


Battery Performance Testing and Review - September 2020



With a Battery Life of 1.5 Days of Use, the OnePlus 8 Pro end users can very accurately set display experience. As for every Smartphone offering to change refresh rate we have tested with 120 Hz and 60 Hz settings. 120 Hz (adaptative) is the default refresh rate, this is an interesting point as this means that OnePlus is confident in getting here a good trade-off between fluidity and battery life.

OnePlus 8 Pro also allows changing resolution. We have kept the default FHD+ resolution. Indeed when display is set to 120Hz/QHD+ fluidity and browsing/reading experience is excellent but in this case, the Battery Life is highly impacted. With a battery capacity of 4510 mAh, this smartphone is durable by design, with a 120Hz Fluid display and a super-fast Qualcomm® Snapdragon™ 865 and 5G.


Product Features and Specifications

  • Design: Waterfall Display edges

  • Camera:  QUAD 48MP

  • Battery:  1.5 days of use/ 4510mAh

  • Display: 6.78" QHD + with 120Hz refresh rate

  • Size: 165.3 x 74.3 x 8.5 mm

  • Weight: 199g

  • Memory: 128 - 512GB ROM and 8GB RAM

  • Chipset: Qualcomm® Snapdragon™ 865 and 5G


Battery Performance


OnePlus is known to be first smartphone maker to release a flagship killer. A flagship killer is integrating a full set of premium components, especially the most powerful chipset of the moment.

However in order to keep the price below competition manufacturers should compromise on one or several topics: build quality, picture quality, battery capacity, audio performance… OnePlus is not any more a flagship killer. Indeed after several generations of device range, OnePlus has now settled himself as a true flagship maker, bringing also its own innovation.

OnePlus was for instance one of the first to introduce higher refresh rate. 120 Hz display is of course available on the latest OnePlus 8 Pro, animated by very smooth Oxygen OS and powerful snapdragon 865. OnePlus has equipped its OnePlus 8 Pro with a 4510 mAh battery. Let’s check if with an impressive spec sheet OnePlus 8 pro can deliver premium battery life. 

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

From the OnePlus 8 Pro test results, we have given this Smartphone a ViserMark Battery Performance Score of 46. The Battery Performance Label, being nearer 100 indicates that it is one of the better-performing ones and has been ranked in 49th place of the best Battery Performance Smartphones as tested by SmartViser.


Testing Results

BATTERY LIFE - Days of Use

When at 120 Hz OnePlus 8 Pro, the battery life achieves around 39 hours and it obtains of Battery Life of 1.5 Days of Use.

When set to 60Hz OnePlus 8 Pro achieves an interesting result with a battery life achieving 49 hours obtaining a Battery Life of 2 Days of Use. With such a great display it would be a pity to stick to a lower refresh rate.

Here is below a summary of results achieved with 2 different refresh rates:


Test Graphics

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

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

As the OnePlus 8 Pro offers an adaptive impact of 120 Hz refresh rate is noticeable but not excessive.

Figure 1. Battery test at 120 Hz


There are a number of power-efficient processors, within today's Smartphones, that are able to cope with the growing number of new applications and can 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 least and 5 being the most power-efficient.

The OnePlus 8 Pro achieved an overall Power Efficiency Score of 1

  • Best Smartphone for Power Efficiency: Ranking #72



The OnePlus 8 Pro is a 2020 flagship range proposal from OnePlus. This Smartphone will not disappoint end users on battery life side, it does a good job. Customers will enjoy an excellent experience without caring too much about battery draining.


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 smartphone camera industry. We appreciate your interest in VCX-Forum.


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OnePlus Technology (Shenzhen) Co., Ltd., commonly referred to as OnePlus, is a Chinese smartphone manufacturer headquartered in Shenzhen, Guangdong. It was founded by Pete Lau and Carl Pei in December 2013. The company officially serves 34 countries and regions around the world as of July 2018


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If you're looking for the best smartphone on the market, battery performance is one of the key decisive aspects then ViserMark is for you.

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. 


If you are a Smartphone Manufacturer and looking to improve the Battery Performance of your Smartphones, please get in touch to discuss how we can help you.


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