Turn on the phone function, you can know the health of the phone battery, both Android and Apple can do it!
The key data mainly viewed is the battery voltage, which mainly includes:
3.7V ~ 4.3V(3700mV ~ 4300mV) is normal.
If it is lower than 3.7V, and there is a big difference, the basic battery is in a damaged state, and a new battery can be considered.
Of course, this voltage value will change with the change of power and charging time;
When fully charged, the battery voltage at this time basically reaches the maximum value of the range, but eventually changes within its range. If it exceeds too much, an abnormal situation may occur.