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  • Daniel Chaparro

OnePlus 8T - Battery Performance Score

Updated: Mar 30, 2022


Battery Capacity mAh: 4500


Smartphone Battery Performance: Ranking #18

In joint first for Smartphone Battery Performance within the


Battery Performance Testing and Review - January 2021



With a 120 Hz Fluid AMOLED screen and a faster and more powerful charge, the OnePlus 8T is the evolved version of the OnePlus 8. With the 8T, OnePlus presents the most powerful charge solution so far, the “Warp Charge 65” provides users with one-day autonomy for 15 minutes charge and a full charge in just 39 minutes. OnePlus is hailing the device as “Ultra-Fast Charging. Ultra-Smooth Scrolling’’.

The OnePlus 8T is equipped with a Qualcomm Snapdragon 865 5G mobile platform with Snapdragon X55 5G Modem-RF-System for a fluent 5G multigigabit connectivity. In terms of display, the 120 Hz Fluid AMOLED is rated with A+ from DisplayMate, offering extreme colour accuracy and fluent navigation.

Just like the 8 and the 8 Pro model, the 8T does not have a headphone jack, however, the OnePlus Buds Z is a wireless option specially designed to take to the next level users audio experience. In terms of design, The OnePlus 8T has a glass rear, which is protected by Gorilla Glass technology, and a metal frame that gives it a premium feel.


Release Date: December 2020

Product Features and Specification

  • Design: Premium feel with a Gorilla Glass Technology at the back

  • Camera: 48 MP Main Rear Camera, 16 MP Ultra-Wide-Angle Camera, Macro Lens, and Monochrome Lens. 16 MP Front Camera.

  • Battery: 4500 mAh (2S1p 2250 mAh, non-removable)

  • Display: 6.55"

  • Size: 160.7 x 74.1 x 8.4 mm

  • Weight: 188g

  • Memory: 128GB RAM: 8GB

  • Chipset: 5G X55

  • Android Version: Android 11 with OxygenOS 11

  • Software Version: KB2003_15_201113


Battery Performance


The OnePlus 8T is classed as a ViserMark High Tier Smartphone (between 500-699 EURO).

Replacing the OnePlus 7T model that does not support 5G Technology, the OnePlus 8T is aimed to fit between the OnePlus 8 and the OnePlus 8 Pro.

The battery does not offer wireless charging, but the company tries to compensate with fast charging capabilities.

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

From the OnePlus 8T test results, we have given this Smartphone a ViserMark Battery Performance Score of 51. The Battery Performance Label, being nearer 100 indicates that it is one of the better-performing ones and has been ranked in 18th place of the best Battery Performance Smartphones as tested by SmartViser.


Testing Results

BATTERY LIFE - Days of Use

Through the ViserMark test protocol, the OnePlus 8T battery life lasts over 48 hours and it obtains a ViserMark Battery Life Score of 2 Days of Use.

The average ViserMark Battery Life score of High Tier Smartphones is 1.7 Days of Use, meaning this Smartphone is performing above average within its price category. This is an impressive result, positioning the OnePlus 8T in the Top 20 of the ViserMark Battery Life autonomy ranking.


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.

Figure 1. Battery test at 90 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 8t achieved an overall Power Efficiency Score of 1.5

  • Best Smartphone for Power Efficiency: Ranking #60



To conclude, the OnePlus 8T Smart 2021 Battery Performance Score achieved was 51 and is higher than all other High Tier Smartphones. The OnePlus 8T offers an autonomy of 2 days with a 4500 mAh battery. Compensated with one of the fastest and most powerful charging systems in the market for those who need are on the move and need a quick charge.

The OnePlus 8t Smartphone performs better than the Samsung S20 FE 5G (50) and the Oppo Reno 4 Pro 5G (48). It has the same score as one of its main competitors’ Smartphones which is the Huawei P40 Pro (51).


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) - 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 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. 

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