General description Professional and fast Li-Ion battery charger designed for various battery sizes including 18650, 22650, 26650, 21700, and 25500. This charger features advanced technology for efficient charging and battery protection. Technical specifications Dimensions: 53 x 105 x 27 mm Charging current: 2 x 2 A or 1 x 3 A Charging voltage: 4.2 V Charging stages: TC / CC / CV Power supply: Micro-USB (power supply not included) Compatibility and accessories Compatible with 3.6 V / 3.7 V Li-ion batteries: 18650, 22650, 26650, 21700, 25500 Can charge protected 20700/21700 batteries Other information Thermal protection Short circuit protection Prevents reverse insertion of the battery Adaptive intelligent identification with internal resistance test function Accurate shutdown to prevent overcharging