This Smart Rapid Battery Charger is designed for recharging 3.7V Li-ion IMR batteries (Batteries not included). It is built with Intelligent Quick technology which enhances the charging speed up to 500mA, effectively expediting the charging process and saving time. The charger is compatible with 3.7V Li-ion, Lithium-ion IMR, INR, and ICR 26650, 25500, 22650, 18490, 18500, 18650, 18350, 16340 RCR123A, 14500, and 10440 batteries. This portable and travel-ready charger can be used in any AC enabled location. Equipped with MCU controlled technology, it also contains an advanced 'overtime' safety function that automatically stops charging as soon as the battery is fully charged. The charger includes a smart LED indicator to show its charging progress; once all three LEDs are lit, it signifies that the battery is fully charged. This charger features individual charging slots for 1 to 2 different compatible batteries and optimizes the capacity of the batteries. Built with three charging modes, Constant Charge Current (CC), Constant Charge Voltage (CV), and Trickle Charge, this charger provides constant current and voltage and overheat-detection to prevent over-charging. Additionally there is a 5V1A USB charging port on the side.