Lithium Battery Charging Board Parameters：
Input voltage: 5V
Charge cut-off voltage: 4.2V±1%
Charging current: 1000mA(max)
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Indicator type: red light is charging, green light is full

Instructions:
1. Note: When the battery is connected for the first time, there may be no voltage output between OUT+ and OUT-. At this time, the protection circuit can be activated by connecting the 5V voltage and charging it. The battery is disconnected from B+ B- and then connected. It also needs to be charged to activate the protection circuit. When using a mobile phone charger as input, note that the charger must be able to output 1A or more, otherwise it may not be able to charge normally
2. The USB female socket and the + - pads next to it are the power input terminals, which are connected to 5V voltage. B+ is connected to the positive electrode of the lithium battery, and B- is connected to the negative electrode of the lithium battery. OUT+ and OUT- are connected to the load, such as the positive and negative poles of the mobile booster board or other loads
3. Connect the battery to B+ B-, insert the mobile phone charger into the USB socket, the red light is on, it is charging, and the green light is full.

2A DC-DC Boost Converter Specifications:
Input Voltage: DC 2V-24V
Output Voltage: DC 5V-28V
Maximum Output Current: 2A
Maximum Conversion Efficiency: 93%

Attention:
The input voltage should not exceed the maximum input voltage.
The peak current output current no more than 2A.

Package Included：
5 x Lithium Battery Charging Board
5 x 2A DC-DC Step Up Converter
5 x 1 Slots Battery Box
2 x 50cm/19.68in 26AWG Cable