Many recent OPPO phones show a Maximum Capacity figure that tells you how much of the original battery is left. It sits in a Battery Health page in ColorOS, alongside OPPO's charging protection settings. Here is how to find it, what OPPO says the numbers mean, and how to set up Smart charging and a charging limit.

Check Maximum Capacity in ColorOS

  1. Open Settings.
  2. Tap Battery.
  3. Tap Battery Health.
  4. Read Maximum Capacity.

Maximum Capacity compares what the battery can hold now with what it held when new. It falls slowly as the battery ages. The feature depends on the phone's hardware. OPPO lists models including the Find X8, Find X7 and Find X6 series, Find N2 and Find N2 Flip, the Reno9 and Reno10 series, Reno11 Pro, Reno 14 and A1 Pro 5G. If you do not see Battery Health or Maximum Capacity, your model does not support the readout.

What the numbers mean

  • 80% or higher: OPPO says battery performance is generally good.
  • Below 80%: the phone still works normally, but battery life may be affected. You will notice it lasts less time on a charge.

When health drops a lot, ColorOS can show a message that battery health has significantly deteriorated, resulting in a noticeable decrease in battery life. OPPO's advice at that point is to visit an OPPO Authorized Service Center for inspection. Read when to replace a phone battery to weigh up a replacement.

We could not find an official ColorOS screen that shows a lifetime charge cycle count. Our cycle count guide explains what cycles mean and other ways to track them.

OPPO Battery Health Engine

On supported phones you may see OPPO's Battery Health Engine mentioned. It is a system-level combination of a smart battery health algorithm and what OPPO calls battery healing technology. It first appeared on the Find X5 Pro in 2022, and OPPO says it lets the battery keep 80% of its original capacity after up to 1,600 charge cycles in its lab tests. It works in the background; it is not something you switch on.

Turn on Smart charging (Optimized night charging)

Smart charging learns when you usually sleep and wake, holds the charge lower overnight and aims to reach 100% at your usual wake time. Where to find it depends on your ColorOS version (it exists from ColorOS 11, and availability varies by model):

  • ColorOS 13 and later, phones with Battery Health Engine: Settings > Battery > Battery Health > Optimised or Smart charging > At night.
  • ColorOS 13 and later, other phones: Settings > Battery > Smart Charging > At night.
  • ColorOS 11 and 12: Settings > Battery > More battery settings (or Advanced settings) > Optimized Night Charging.

Use a charging limit

Newer OPPO phones can also stop charging at a set level. Reviews of ColorOS 15 on the Find X8 describe an 80% charging limit toggle in the battery health settings, and OPPO's support pages describe a charging limit option on models such as the K13 5G, which can also pause at 80% during long charging. Look on the Battery Health page for an option called charging limit; on newer ColorOS versions you may be able to choose the level. Where both exist, Smart charging and a custom charging limit may not be usable at the same time, so pick the one that fits your routine.

What about OPPO secret codes?

You will see codes such as *#899# (an after-sales test menu on many models), *#800# (now a feedback and log tool) and *#6776# (software version) listed online. None is documented by OPPO as a battery health check, many are disabled on ColorOS 13 and later, and the results vary by model. The Battery Health page is the reliable place to look.

OPPO's support channels also mention a system diagnosis tool in the My OPPO app for quick fixes, but we could not confirm a battery capacity readout there.

Tips for a healthy OPPO battery

How bCare helps on OPPO

Maximum Capacity gives you one percentage. bCare's battery health score adds the detail behind it: real capacity in mAh measured during normal 20 to 80% charges, compared with the design capacity, charge cycles and a 14-day trend, on any OPPO, including models without the Battery Health page. A battery full alarm rings at the level you choose, and the overheat alert warns you when a fast charge pushes the battery temperature too high.