| Pin | Name | Function |
|---|---|---|
| 1 | IN+ (VCC) | USB input +ve |
| 2 | IN- (GND) | USB input ground |
| 3 | B+ | Battery + |
| 4 | B- | Battery - |
| 5 | OUT+ | Output + |
| 6 | OUT- | Output - |
Summary
Single-cell Li-ion/Li-Po battery charger module. Charges from USB (Micro-USB or USB-C depending on the board). This covers the common 'with protection' version, which adds a separate protection chip (DW01A + FS8205A) to prevent over-discharge, over-current, and short circuit — plain TP4056-only boards exist too and skip the OUT+/OUT- pins.
- Charge current: Up to 1A (adjustable via a resistor on some boards)
- Input voltage: 4.5V - 5.5V (via USB)
- Charge voltage: 4.2V
- Protection: Over-charge, over-discharge, over-current, short-circuit (protected variant)