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  • Daniel Chaparro

OPPO A15 - Battery Performance Score

Updated: Mar 30, 2022


Battery Capacity mAh: 4320


Smartphone Battery Performance: Ranking #34

Placed within the Mid table of Smartphones for Battery Performance within the Entry Tier Ranking Table


Battery Life Testing Report – March 2021




At the end of 2020, OPPO presented the A15, an entry-level device offering similar features to other devices in the same price range. A triple camera with limited resolution and a well-sized battery without a fast charge option stand out from this economic classic line.


Release Date December 2020

Product Features and Specification

  • Design: 3D curved design

  • Main Camera: 13 MP, f/2.2, (Wide), 1/3.1”, 1.12µm

2 MP, f/2.4, (macro)

2 MP f/2.4, (depth)

Video: 1080p@30fps

  • Selfie Camera: 5 MP, f2/4, (wide)

  • Battery: 4230 mAh

  • Display: 6.52"

  • Size: 164 x 75.4 x 7.9 mm

  • Weight: 175g

  • Memory: 32GB RAM: 2GB

  • Chipset: MediaTek MT6765 Helio P35 (12nm)

  • Android: Android 10, ColorOS 7.2

  • Software Version: CPH2185_11_A.16


Battery Performance


The OPPO A15 is an Entry-Tier smartphone in the ViserMark ranking (Smartphones priced between 0-199 EURO). It is equipped with a humble chipset, the MediaTek MT6765.

OPPO has powered the A15 with a 4230 mAh capacity battery, more than enough to serve its modest component.

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

From the OPPO A15 test results, we have given this Smartphone a ViserMark Battery Performance Score of 49. The Battery Performance Label, being lower than 50 indicates that it is one of the mid-performing Smartphones and has been ranked in 34th place of the best Battery Performance Smartphones as tested by SmartViser.


Testing Results

BATTERY LIFE - Days of Use

Through the ViserMark test protocol, the OPPO A15 achieved a ViserMark Battery Life score of 2 Days of Use.

The average Day of Use ViserMark score of an Entry -Tier device is “2.2” Days. The OPPO A15 score places the Smartphone 25th in rankings.


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.

OPPO A15 Test Graphics


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 OPPO A15 achieved an overall Power Efficiency Score of 2, placing the device 21st within the ranking for Power Efficiency.



To conclude, the OPPO A15 performance is good given the battery capacity (4230mAh) and the modest components it uses, its score stands very close to other Entry Tier devices with a similar battery capacity like the Realme C11 with a performance of 50 or the Xiaomi Redmi with a score of 49.


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.



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OPPO is part of and owned by, BBK Electronics, a major Chinese consumer electronics firm. Launched by CEO Cheng Mingyong in 2004, OPPO became China's largest smartphone manufacturer in a mere 12 years. By 2016, the brand could be found everywhere, with OPPO phones being sold in over 200,000 retail outlets across the nation.


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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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