The Authentic Nitecore New I2 Dual-Slot Li-Ion charger and adapter is black in color and is made of polycarbonate with a full copper concise design. The e-cig charger can charge two batteries at a time. It has an input voltage rating of 100 to 240 VAC or 9 to 12 VDC, input current rating of 0.25 mA, and a power rating of 8 W. The charger comes with an EU type plug. It can charge 1.2 V, 3.7 V, 4.2 V, and 4.35 V Li-ion, IMR, LiFePO4, Ni-MH, and Ni-Cd cylindrical batteries of various sizes. The battery charger also has a maximum charging capacity of 1,000 mA in just one slot. The charger is capable of automatically selecting batteries based on their capacity and detecting non-rechargeable lithium batteries using four LED lights. The four LEDs also notify the user if a battery is installed with reverse polarity. It uses a microprocessor to recognize the type of battery and use the right voltage and current required for charging. The dual-slot charger uses the button marked C to enable IMR battery restoration and the V button to set separate charging voltages for each slot. The battery charger has a size of 75 x 132 x 35 mm and weighs 120 g.