Specification:
Input Voltage: 5V
Charge Cut-off Voltage: 4.2V ±1%
Maximum Charging Current: 1000mA
Battery Over-discharge Protection Voltage: 2.5V
Battery Over-current Protection Current: 3A
Size: 2.5*2cm / 1*0.8in
Quantity: 10pcs
Weight: 27g / 1oz (approx.)

Current Adjustment
RPROG (k) IBAT (mA)
30 50
20 70
10 130
5 250
4 300
3 400 
2 580
1.66 690
1.5 780
1.33 900
1.2 1000

Package list:
10 * Charging Boards

Instruction:
When connecting to battery for the first time, there may be no voltage output between OUT+ and OUT-, then the protection circuit need to activated by connecting to 5V.
The protection circuit also need to be activated if battery is disconnected from B+, B- then connect again.
The output current of phone charger should be no less than 1A, otherwise it may not charge normally.
The Micro USB socket and the "+ -" solder pad next to it are power input, and should connect to 5V voltage.B+ is connected to positive pole of battery, B- is connected to negative. 
OUT+ and OUT- are connected to load, for example, mobile boost board or other loads.Connect battery to B+, B-, then phone charger to Micro USB socket; the red light on means it is charging, green light mains fully charged.