Base OnlyThe Green Extreme Dual Smart Charger with LCD Screen is a rechargeable battery solution for serious professionals and hobbyists. Easy to read LCD takes the mystery out of charging your Lithium and Ni-Cad batteries. Know instantly how much charging has completed thanks to the clearly visible numerical and bar display, which tells you what percentage of charge. The backlit screen is visible from any angle in any lighting conditionUniversal power input allows you to charge your batteries anywhere, by connecting your charger with to standard AC (110-240v) or an optional DC (12-24v) power source. This makes it the best charger for photographers on the move, allowing your batteries to be charged from virtually any wall outlet or vehicle in the world.Universal power output charger automatically detects the voltage of ANY battery mounted to it, so that by swapping out the battery plate, you can charge additional camera battery types without requiring additional chargers. See the accessories section below for available charging plates.Dual slots lets you charge two battery type batteries at the same time, cutting your prep time in half.The side USB port allows you to charge phones, tablets, power packs, and other USB powered devices simultaneously.