Easy to use and secure Can install 4X 18650 battery (battery is not included, and you need to weld the batteries and the PCB board yourself)
Can also be used as Battery charger for 18650 batteries
Function: power bank and rechargeable 18650 battery charger Plug and Play, power output using the USB port, plug the data cable to achieve portable, ready to charge Compatible
type: 18650 battery Input:DC 5V/1A Output:DC 5V/2.1A Size:22*77*114mm Color
Note: battery is not included, and you need to weld the batteries and the PCB board yourself Package