Lithium Battery Charge Control Module Mini USB DC 5V 1A

This charger is a very small battery charger module. It uses the 4056 chip controller and standard configuration is with 1A charge current.

Datasheet: Click Here
Specifications
Chip: 4056
Plug Type: Mini USB
Input Voltage: 5VDC
Output Voltage: 3.7V to 4.2V
Charging cut-off voltage: 4.2V ± 1%
Charge Current Max: 1A
Battery over-discharge protection voltage:  2.5V
Battery overcurrent protection current:   3A
Size(LxWxH): 24x18x5mm