2S LiPo balance connector (JST-XH 3-pin) connects to a charger to monitor and balance each cell individually during charging. Pin 1 is pack negative, pin 2 is cell junction, pin 3 is pack positive.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Pack negative | GND |
| 2 | BAL1 | Cell 1 positive / Cell 2 negative junction | I/O |
| 3 | V+ | Pack positive | PWR |