Adafruit Micro Lipo USB LiIon/LiPoly Charger v1

The Adafruit Micro Lipo Charger v1 is a tiny, simple single-cell LiPo/Li-Ion charger based on the MCP73831 chip. Plug in USB for power, connect your 3.7V battery via JST, and it charges safely with automatic termination. A charging LED indicates status.

LiPo charger comparison

Charger	Charge rate	Input	Features
Adafruit Micro Lipo v1 (this)	100mA / 500mA	Mini USB	Simple, tiny
Micro Lipo MicroUSB	100mA / 500mA	Micro USB	Same but MicroUSB
TP4056	1A	Micro USB	Budget, protection option
USB/DC/Solar Charger v2	500mA	USB, DC, Solar	Triple input, load sharing