Just plug in a pair of Traxxas iD. Technology eliminates complicated charger programming by automatically configuring and optimizing the charge settings for Traxxas iD batteries.Dual charges two batteries simultaneously at up to 50 watts (4-amps) each, or switch to High-Output mode to charge a single battery at the maximum 100 watt (8-amps) output. Charging faster means more fun time behind the wheel. You can even charge a NiMH and a LiPo at the same time! The progress bar and audible alerts keep you informed while the advanced high resolution peak detection delivers a perfect charge every time. The EZ-Peak Dual's Storage Mode protects your LiPo battery investment by safely preparing the batteries for extended storage.