Model I2 Input AC 100-240V 50/60Hz/ DC 12V Output Voltage 4.2V +/- 1% or 1.4V +/- 1% Output Current 500mA x 2 Dimensions 132mm x 70mm x 35mm Compatible Batteries LI-ion/IMR 26650, 22650, 18650, 18500, 18490, 18350, 17670, 17500, 16430, 14500, 10440.Ni-MH / Ni-Cd AA, AAA, AAAA, C The Nitecore charger range has become the standard in the vaping world, they automatically detects the type of battery inserted and choose the appropriate charging method, For IMR batteries the battery of choice for mechanical mods they monitor the entire charging process and maintain the correct safe voltage at all times which will extend the overall lifespan of the battery. Nitcore Chargers not only optimize the charging process for maximum performance but detect when charging is complete for each battery and automatically stops the Charging Process. The Nitecore I2 is capable of charging 2 batteries simultaneously