The mobile power is stacked on the for Arduino board and powered via the 5V/GND pin. It has a USB-A output interface that you can use to connect to other devices using a USB cable. The charging interface is micro USB, and the charging tool is convenient to obtain (such as: for Android mobile phone adapter). When it is stopped, it is recommended to turn off the power output and let the mobile power supply enter the standby state, thus saving limited battery energy.
It uses 16340 lithium battery (battery not included), the shield works with one or two batteries. Two 16340 lithium batteries (depending on the battery capacity) has about 1500mAH capacity.
Lithium Battery Model: 16340
Charging current: 500mA
Discharge current: 1000m