Features 1.Automatic Charging: The internal resistance and leakage resistance of the battery charger module are automatically charged, making it convenient for you to use it at any time. 2.Main Application: The battery charger is able to make the battery voltage not lower than the input voltage and prevent the power from short circuit, which prolonged the service life of your equipment. 3.Battery Protection: The battery charger has a strong adaptability to input power. It means the battery power is able to defend your power at most times. 4.Standard Production: The port of the battery charger has a Type C interface, which is able to work with all Type C devices. The Type C port is also an increasingly popular choice. You can buy one as preparation. 5.Easy Carrying: The battery charger module is small in size. It is convenient for you to take it out and use it anywhere. Specification Item Type: Lithium Battery Charger Module 4 Cell(4S) 16.8V Version: Input Voltage: DC 3-6V(Recommended DC 3.7V 5V) Charging Voltage: 16.8V Package List 1 x Battery Charger Module