HiLetgo 3pcs WeMos D1 mini Single Lithium Battery Charging Board D1 Lithium Boost Shield
You can use D1 mini without usb cable, it's really wireless now.
Put D1 mini?anywhere, using this battery shield and a lithium Battery.
Boost, just connect?lithium Battery to this shield, power supply for the entire D1 mini?system.
Charging, when the battery run out, you do not need to unplug?the battery, just?using?usb port to charging.
1. Connect to lithium Battery (normal 3.3-4.2V)
2. Charging port (normal 5V)
3. Green LED, lights when charging is completed
4. Red LED, lights when charging
1.Normal pins x2pcs
2.Battery Shield x1pcs