1 pc USB Charger for 18650/21700 Batteries, Single-Slot Charger for 3.7V Batteries

Universal Compatibility: The charger is designed to charge various types of 3.7V cylindrical lithium batteries with direct current. It is compatible with 18650/21700 batteries.

Multiple Protection Features: The charger is equipped with a dedicated charge and discharge management circuit incorporating multiple safety features. It effectively prevents reverse charging, short circuits, overcharging, over-discharging, and overcurrent, ensuring safe use of the product.

Charging Indicator: The charger has a red/green LED indicator that displays the status of each battery during charging.

It automatically detects the battery level, displays the charging progress, and stops charging once the battery is fully charged.

Compatible Devices: The charger can be used as a backup power source for a wide variety of devices, including flashlights, headlamps, fans, digital cameras, children's toys, radios, speakers, camcorders, and surveillance devices.

Package Contents: The package includes one charger.