ITEM NAME:WeMos D1 mini Single Lithium Battery Charging Board D1 Lithium Battery Boost JR.When the battery run out, you do not need to unplug the battery, just using usb port to charging. XH2-2.54MM (Port 1): Connect to lithium Battery (normal 3.3-4.2V). Charging Current: max: 1A. Micro USB (Port 2): Charging port (normal 5V).
