This is a 3.7V lithium battery charger module based on TP1056 with Micro USB interface.It is small size and light weight, especially for a single lithium battery charging.

Features:

1. Input voltage: 4.5V ~ 5.5V.

2. Input Interface: Micro USB port (phone used).

3. Charging method: linear charge.

4. A full charge voltage: 4.2V.

5. Charge Current: 1A (default), modify the onboard resistor to adjust the charging current according to the table below.

6. Charging accuracy: 1.5%.

7. Charging indicator: Blue LED charging, Red LED full.

8. Output Reverse: lithium batteries can not reverse.

9. Dimensions: 25 x 19 x 10mm.