This module allows using D1 Mini without USB cable so it can be truly wireless. Put D1 Mini anywhere using this battery shield and a lithium battery. A lithium battery connected to this shield provides power for the entire D1 small system. There is a charging module on the board. When the battery runs out, you don't need to unplug the battery, just use USB port to charge. 1. Connect to lithium battery (standard 3.3-4.2v) 2. Connect a charger to USB port (normal 5V) 3. Green LED - charging is completed 4. Red LED - charging in progress https://elecena.pl/product/22624711/wemos-d1-mini-1a-charging-shield 2023-02-23 https://elecena.pl/product/22624711/wemos-d1-mini-1a-charging-shield 2025-10-28