This is a 3.7V lithium battery charger module based on TP4056 with Micro USB interface.It is small size and light weight, especially for a single lithium battery charging.
Input voltage: 4.5V ~ 5.5V.
Input Interface: Micro USB port (phone used).
Charging method: linear charge.
A full charge voltage: 4.2V.
Charge Current: 1A (default), modify the onboard resistor to adjust the charging current according to the table below.
Charging accuracy: 1.5%.
Charging indicator: Blue LED charging, Red LED full.
Output Reverse: lithium batteries can not reverse.
Dimensions: 25 x 19 x 10mm.