There are positive and negative symbols next to the battery chip.
There are signs near the battery metal, positive, - negative
The mobile phone battery is an energy storage tool that provides power for the mobile phone, which is composed of three parts: battery, protection circuit and shell. The mobile phone battery is generally used by lithium battery and nickel-metal hydride battery.
\"mAh\" is a unit of battery capacity, the Chinese name is milliampere-hour.