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DisplayWe 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
Key performances
These key points are derived from the lab measurements during testing and do not figure into the overall score. The lab measurements, however, are used for the overall score.
17th
6th
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 (not included) |
21W | OLED 1080 x 2400 |
Google Tensor |
| Samsung Galaxy A53 5G | 5000mAh | 25W (not included) |
- | AMOLED 1080 x 2400 |
Samsung Exynos 1280 |
| Apple iPhone SE (2022) | 2018mAh | 18W (not included) |
15W | LCD IPS 750 x 1334 |
Apple A15 Bionic |
Autonomy
Oppo Reno8 5G
195
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.
Battery Life (moderate)
76th
Battery Life (moderate)
14th
Home/Office
Oppo Reno8 5G
221
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.
On the go
Oppo Reno8 5G
195
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
Calibrated
Oppo Reno8 5G
198
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.
Charging
Oppo Reno8 5G
218
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.
Full charge
Oppo Reno8 5G
224
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.
Charging Time 0-80%
11th
Charging Time 0-80%
3rd
Quick boost
Oppo Reno8 5G
212
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.
Efficiency
Oppo Reno8 5G
154
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.
Charge up
Oppo Reno8 5G
205
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 %.
Discharge
Oppo Reno8 5G
194
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.
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