Traxxas 8.4V 4200mAh NiMH Flat Battery Pack with the Traxxas iD Connector

This is the Traxxas 7-Cell 8.4V 4200mAh NiMH Flat Battery Pack with the Traxxas iD Connector.

Traxxas 4000-series Power Cell NiMH battery packs provide 25% greater capacity than 3000-series batteries for longer run times and higher sustained voltage under load. Low-resistance cells, flexible, silicone-jacketed 12-gauge wire, heavy-duty welded tabs, and Traxxas' exclusive iD battery system deliver an easier and more rewarding battery experience for your Traxxas model.