The EZ-Peak^® 2998 4s Completer Pack delivers maximum power and run time for the speed and acceleration you crave. Punch the throttle and the 2890X 4-cell 6700 mAh LiPo battery with iD^® technology lights up the tires for blistering speeds and extra-long run times. Traxxas iD batteries are the easiest and safest LiPo charging solution when used with our exclusive iD chargers. You just plug in your iD battery and press start. The iD charger handles all the settings and quickly gives you an optimized charge every time. The 2981 EZ-Peak Plus 4S multi chemistry charger get you back in the action quickly with 75-watt 8-amp charging power for more fun behind the wheel.