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We put the Oppo A78 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: 5000 mAh
- 33W charger (included)
- 6.56-inch, 720 x 1612, 90 Hz, LCD display
- MediaTek Dimensity 700 (7 nm)
- Tested ROM / RAM combination: 128 GB + 4 GB
Scoring
Sub-scores and attributes included in the calculations of the global score.
Oppo A78 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.
30th
14th
Pros
- Very good autonomy, with almost 3 days of autonomy when used moderately
- Excellent autonomy on the go
- Low discharge current in almost all use cases
Cons
- Longer-than-average charging time
- Inaccurate battery gauge: 93% actual measured capacity shown as 100% on the display
- High discharge current when watching videos
The Oppo A78 5G battery provided excellent autonomy when tested in factory default mode. The device’s charge lasted almost three days when used moderately, and on-the-go performance was excellent. When testing usage separately, autonomy was closer to the average.
The device showed good results when streaming videos in 4G and during idle time. However, autonomy when calling or listening to music was only average, compared with the excellent results when tested in factory default mode.
Charging the battery to full capacity took 1 hour and 34 minutes, which was slightly longer than average. A quick 5-minute charge provided 4.5 hours of autonomy, only 10 minutes more than our database average. Moreover, when the device indicated 100% of battery level, the real battery capacity was closer to 93%, which could impact the user experience.
The charger efficiency tipped to just below our database average, but the adapter efficiency was a bit above average. The residual consumption of the charger was average, too. Discharge currents were low during our typical usage scenario and when streaming videos in 4G, meaning that the device is well-optimized for these use cases. However, the discharge currents when gaming or watching videos in Wi-Fi or airplane mode were higher than average.
Compared with devices from the same range price ($200 – $399), the Oppo A78 5G ranked above average in our database. It showed excellent autonomy in factory default mode, but the charging and efficiency scores were just 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 A78 5G | 5000mAh | 33W (included) |
- | LCD 720 x 1612 |
Mediatek Dimensity 700 |
| Oppo A77 5G | 5000mAh | 33W (not included) |
- | LCD 720 x 1612 |
MediaTek Dimensity 810 |
| Honor X7a | 6000mAh | 23W (included) |
- | LCD 720 x 1600 |
Mediatek Helio G37 |
Autonomy
Oppo A78 5G
188
Autonomy score is composed of three performance sub-scores: Home / Office, 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)
14th
Battery Life (moderate)
10th
Home/Office
Oppo A78 5G
213
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 A78 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 A78 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 A78 5G
181
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 A78 5G
184
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%
77th
Charging Time 0-80%
16th
Quick boost
Oppo A78 5G
182
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 A78 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 A78 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 A78 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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