This is a replacement Traxxas "Series 5" 7-Cell 5000mAh Stick NiMH Battery Pack with a Traxxas iD Connector. The maximum possible capacity in an iD-equippped Power Cell NiMH pack! Experience the longest run times and highest sustained voltage under load, ideal for peak performance in power-hungry models, such as the brushless-equipped Rustler VXL, Bandit VXL, Stampede VXL, E-Maxx Brushless Edition, and E-Revo Brushless Edition Traxxas Series 5 Power Cell batteries feature the latest 5000mAh NiMH cells, and are available in 7-cell hump and flat configurations to fit all Traxxas 1/10 scale electric models. High-Current Connector Revolutionary concepts come in all shapes and sizes, and the patented Traxxas High-Current Connector defines the new standard for efficiency, ease of use, and high-current handling. Charging with a Traxxas iD Charger The Traxxas iD battery system is the easiest and safest way to charge your Traxxas batteries. The EZ-Peak Plus (TRA2970) recognizes Traxxas iD batteries and in an instant automatically configures and optimizes the charger settings. There's no need to be a battery expert or learn how to navigate complex menus. Just plug in a Traxxas iD battery and EZ-Peak Plus does all the work for you. Features: High-current connector Gold-plated copper terminals MAXX cable high-efficiency 12-gauge silicone jacketed wire