This is an "appallingly small" add-on shield for ESPea that mounts on the bottom, USB-end of the ESPea by soldering the board to the GND, 3V3. The heart of the board is the LTC4054 battery management chip by Linear Technology. The board has +/- through-hole mounting holes for a JST LiPo battery connector (supplied with the LiPo charger) and for an external DC power supply.
The swtich (SW1) can open / close the power from battery shield.
- LED1 is led for charge. It will be off when battery is full charge
- LED2 will turn on when battery is full charge
- LED2 will turn on when device is powered by battery
- LED1 充电指示灯，电池充满LED1熄灭；
|Size||25.6mm x 34mm without headers soldered in|
|Power Connector||ph2.0-2p JST connector and 5.5mm / 2.1mm DC barrel plug|
The 5.5mm / 2.1mm DC barrel plug not soldered default.