Description:
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.
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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

Package Included:
2*.Normal pins
1*Battery Shield