This is the Traxxas EZ-Peak Dual Multi-Chemistry Battery Charger. Simple. Fast. Just plug in a pair of Traxxas iD batteries and press Start. Traxxas’ exclusive iD technology eliminates complicated charger programming by automatically configuring and optimizing the charge settings for Traxxas iD batteries. The EZ-Peak 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 amp) 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.