This is the Traxxas Battery and Charger Completer pack with a 7600mAh 7.4V 25C 2-cell battery and an iD charger. The Traxxas 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. The integrated balance connector on Traxxas LiPo iD batteries eliminates fragile balance wires and connectors, along with the need for external balance boards. The EZ-Peak Plus is backed by the Traxxas Lifetime Electronics Warranty for years of reliable service.