The 2s LiPo completer pack includes a 2843X 2-Cell 5800 mAh 7.4-Volt LiPo battery and a 2970 EZ-Peak^® 4-amp LiPo charger. Traxxas LiPo completer packs deliver the ease and simplicity of 1-button charging with the Traxxas iD^® system. There's no need to be a battery expert or learn how to navigate complex menus. Just plug in your iD-equipped battery and press Start. The EZ-Peak charger does all the work for you. Get back in the action quickly with the faster, easier, and safer way to charge your premium Traxxas Power Cell LiPo batteries.