The mobile phone has a built-in battery health engine, so that the battery of the mobile phone can still maintain 80% power after long-term charging. More than 80% battery health is a good experience value, below which it can be used normally. However, in your experience, if you find that the battery health is below 80%, I suggest you go to the service center to test or replace the battery.
View path: Settings > Battery > Battery Health >; Maximum battery capacity
Note: Only some models support this function.