100% brand new and high quality!
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)
Package size: 6*9cm
1 x Battery Shield For WeMos D1