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Oppo Reno8 5G Battery test

This device has been retested in the latest version of our protocol. This summary has been fully updated. For detailed information, check the What’s New article
OTHER AVAILABLE TESTS FOR THIS DEVICE

We put the Oppo Reno8 5G through our rigorous DXOMARK Battery test suite to measure its performance in autonomy, charging and efficiency. In these test results, we will break down how it fared in a variety of tests and several common use cases.

Overview

Key specifications:

  • Battery capacity: 4500 mAh
  • 80W charger (included)
  • 6.43-inch, 1080 x 2400, 90 Hz, OLED display
  • MediaTek Dimensity 1300 (6 nm)
  • Tested ROM / RAM combination: 256 GB + 8 GB

Scoring

Sub-scores and attributes included in the calculations of the global score.


Oppo Reno8 5G
141
battery
130
autonomy
144

189

102

195

122

198

155
charging
152

180

159

182

154

205

146

192

Key performances

Charging Time
2 days 10h
Battery life
Charging Time
0h21
80% Charging time
Charging Time
0h33
Full charging time
Quick Boost
7h autonomy
after 5-minute charge

Pros

  • Decent autonomy during typical usage scenario, with excellent night management
  • Decent performance during calibrated tests
  • Very fast charging
  • 7 hours and 43 minutes of autonomy recovered on average after charging the device for 5 minutes
  • Excellent charge efficiency
  • Low discharge currents overall

Cons

  • Poor autonomy when calling
  • Weak autonomy during on-the-go tests, especially when calling
  • High residual consumption of the charger when the device is fully charged and still plugged in
  • High discharge current when calling

The Oppo Reno8 5G earned an excellent global score thanks to its very well-balanced performances, putting it among our top performers. Autonomy was decent during the typical usage scenario test, with very low discharge currents during the day and night (only 0.67% lost on average per night). In calibrated mode, the device performed well, with autonomy that was always above average, except for calling, where it seemed to struggle.
Outdoor performance was poor, with below-average autonomy across all use cases.
The 80W charger, however, provided an excellent charging performance, filling up the 4500 mAh battery in only 33 minutes and 25 seconds. Users who give the Oppo Reno8 5G a quick 5-minute charge can expect to get on average 7 hours and 43 minutes of additional autonomy.
In addition to being fast, the charge was also efficient, while the power adapter efficiency was average. However, the residual consumption of the charger when the device was fully charged and still plugged into the charger was higher than average, which regularly happens with power adapters as strong as this one.
In general, all the discharge currents were low, meaning that the device was well-optimized. However, when calling, the discharge current was higher than average.
Compared with devices in the same price range ($400 to $599), the Oppo Reno8 5’s overall score is excellent. Autonomy, charging and efficiency scores were above-average, even if the on-the-go subscore was below average.

Test Summary

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

The following section gathers key elements of our exhaustive tests and analyses performed in DXOMARK laboratories. Detailed performance evaluations under the form of reports are available upon request. Do not hesitate to contact us.

Battery Charger Wireless Display Processor
Oppo Reno8 5G 4500mAh 80W
(not included)
- AMOLED
1080 x 2400
Mediatek Dimensity 1300
Google Pixel 6 4614mAh 30W
(included)
21W OLED
1080 x 2400
Google Tensor
Samsung Galaxy A53 5G 5000mAh 25W
(included)
- AMOLED
1080 x 2400
Samsung Exynos 1280
Apple iPhone SE (2022) 2018mAh 18W
(included)
15W LCD IPS
750 x 1334
Apple A15 Bionic

Autonomy

130

Oppo Reno8 5G

182

Wiko Power U30
How Autonomy score is composed

Autonomy score is composed of three performance sub-scores: Stationary, On the go, and Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.

Light Usage
85h
Light Usage
Active: 2h30/day
Moderate Usage
58h
Moderate Usage
Active: 4h/day
Intense Usage
35h
Intense Usage
Active: 7h/day

Home/Office

144

Oppo Reno8 5G

189

Vivo Y72 5G

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power.

Typical Usage Scenario discharge curves

On the go

102

Oppo Reno8 5G

195

Samsung Galaxy M51

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outdoors and perform a precisely defined set of activities while following the same three-hour travel itinerary (walking, taking the bus, the subway…) for each device

Autonomy for on the go use cases (full charge)

Calibrated

122

Oppo Reno8 5G

198

Samsung Galaxy M51

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

Autonomy for calibrated use cases (full charge)

Charging

155

Oppo Reno8 5G

181

Realme GT Neo 3
How Charging score is composed

Charging is fully part of the overall battery experience. In some situations where autonomy is at a minimum, knowing how fast you can charge becomes a concern. The DXOMARK Battery charging score is composed of two sub-scores, (1) Full charge and (2) Quick boost.

Wired
Wired
98%
in 30 min
0h21
0 - 80%
0h33
Full charge

Full charge

152

Oppo Reno8 5G

180

Realme GT Neo 3

Full charge tests assess the reliability of the battery power gauge; measure how long and how much power the battery takes to charge from zero to 80% capacity, from 80 to 100% as shown by the UI, and until an actual full charge.

Power consumption and battery level during full charge
The charging curves, in wired and wireless (if available) showing the evolution of the battery level indicator as well as the power consumption in watts during the stages of charging toward full capacity.
Time to full charge
The time to full charge chart breaks down the necessary time to reach 80%, 100% and full charge.

Quick boost

159

Oppo Reno8 5G

182

Realme GT Neo 3

With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. The chart here compares the average autonomy gain from a quick 5-minute charge.

Average autonomy gain for a 5 minute charge (wired)

Efficiency

149

Oppo Reno8 5G

154

Oppo Reno6 5G
How Efficiency score is composed

The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge rate, both of which combine data obtained during robot-based typical usage scenario, calibrated tests and charging evaluation, taking into consideration the device’s battery capacity. DXOMARK calculate the annual power consumption of the product, shown on below graph, which is representative of the overall efficiency during a charge and when in use.

Annual Consumption Oppo Reno8 5G
4.1 kWh
Efficient
Good
Bad
Inefficient

Charge up

154

Oppo Reno8 5G

205

Nubia RedMagic 7 Pro

The charge up sub-score is a combination of four factors: the overall efficiency of a full charge, related to how much energy you need to fill up the battery compared to the energy that the battery can provide; the efficiency of the travel adapter when it comes to transferring power from an outlet to your phone; the residual consumption when your phone is fully charged and still plugged into the charger; and the residual consumption of the charger itself, when the smartphone is disconnected from it. The chart here below shows the overall efficiency of a full charge in %.

Overall charge efficiency

Discharge

146

Oppo Reno8 5G

192

Apple iPhone 12 mini

The discharge subscore rates the speed of a battery’s discharge during a test, which is independent of the battery’s capacity. It is the ratio of a battery’s capacity divided by its autonomy. A small-capacity battery could have the same autonomy as a large-capacity battery, indicating that the device is well-optimized, with a low discharge rate.

Average discharge current

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