Experience all the performance that's been engineered into your Traxxas models! Our new iD-Equipped Power Cell batteries deliver unmatched speed, acceleration and power in all Traxxas cars, trucks, and boats. Traxxas Power Cell Battery Packs are optimized for free-flowing power and maximum punch with premium quality, low-resistance cells; flexible, silicone-jacketed 12AWG wire; heavy-duty welded tabs; and Traxxas' High-Current Connectors. Precision assembly with attractive, individually wrapped cells and clear overwrap complete the package. Power Cell batteries are available in standard, 6-cell ""flat"" configuration as well as 7-cell flat and ""hump""-style packs. The 7-cell pack offers 15% more voltage to give your model maximum acceleration and speed—depending on your model, top speed can increase by as much as 10mph simply by installing a 7-cell pack, no other modifications required! The 7-cell hump pack fits in all Traxxas models except E-Maxx, Summit and E-Revo, which require a flat pack configuration. Experience faster acceleration, faster top speeds, and Traxxas quality and support with the only batteries engineered for your Traxxas model.