The Authentic Nitecore Intellicharger I4 is black in color and is made of ABS. The charger is compatible with IMR, Ni-MH, Ni-Cd, and Li-ion rechargeable batteries. The intellicharger is capable of differentiating among these batteries, and applying the correct voltage and Trickle Charge, CV, or CC charging technique accordingly. It has four charging slots that are microcomputer-controlled to monitor and charge four batteries at the same time. The fire retardant and resistant charger include an EU type plug and three color LEDs to indicate the charging progress for the batteries individually. The LED indicators turn off when the charging process has finished and/or the batteries are fully charged. The intellicharger is designed to support optimal heat dissipation, reverse polarity protection, and over-charge prevention. It has an input voltage rating of 100 to 240 VAC/5 to 12 VDC, an output current rating of 750 mA x 2 or 375 mA x 2, and an operating frequency of 50/60 Hz. The charger has a size of 138 x 95 x 36 mm and weighs 184 g.