Traxxas 2963X NiMH, 8-Cell, 9.6V Series 5 5000mAh Battery (hump pack) New iD-Equipped Power Cell batteries deliver unmatched speed, acceleration and power in all Traxxas cars, trucks, and boats Premium quality, low-resistance cells; flexible, silicone-jacketed 12AWG wire; heavy-duty welded tabs; and Traxxas' High-Current Connectors Series 5 Power Cell batteries feature the latest 5000mAh NiMH cells for peak performance in power-hungry models Precision assembly with attractive, individually wrapped cells and clear overwrap complete the package Traxxas capacity ratings reflect the minimum capacity for the pack, not the maximum