Connect lithium Battery to this shield, power supply for the entire D1 mini system. When the battery run out, you do not need to unplug the battery, just using usb port to charging.
Charging Voltage: max: 10V, recommend: 5V
Charging Current: max: 1A
Lithium Battery voltage: 3.3-4.2V
Boost Power Supply: 5V(max: 1A)
5V: 5V(max: 1A) Power Supply
XH2-2.54MM (Port 1): Connect to lithium Battery (normal 3.3-4.2V)
Micro USB (Port 2): Charging port (normal 5V)
Green LED: lights when charging is completed
Red LED: lights when charging
J1: setting max charging current, 0.5A or 1A.