The 2992 completer pack contains a powerful, high-capacity #2843x 7.4V 5800 mah lipo battery pack and a #2970 EZ-Peak plus 4-amp charger. Traxxas’ exclusive iD battery system is the easiest and safest way to charge your Traxxas batteries. The EZ-Peak plus recognizes Traxxas iD batteries and in an instant automatically configures and optimizes the charger settings. There's no need to be a battery expert or learn how to navigate complex menus. Just plug in a Traxxas iD battery and press start. Ez-peak plus does all the work for you. At the press of a button, the EZ-Peak plus's storage mode protects your lipo battery investment by safely preparing the batteries for extended storage. 4-Amp fast charging and advanced high-resolution peak detection deliver a perfect charge every time. Ez-peak plus supports conventional lipo charging with its integrated balance ports and advanced mode for manual charging. Ez-peak plus also charges your NiMH batteries with 4 powerful amps of charging power, making it the only charger you’ll ever need.