Traxxas Certified iD-Equipped LiPo batteries provide the punch and power to reach maximum speed. They come in a full range of capacities and configurations. Traxxas iD-Equipped LiPo batteries are engineered to fit Traxxas models perfectly and maximize their potential. Only Traxxas gives you more of what you want: simple installation, a great price, and the most speed and run time available. The patented Traxxas High-Current connector is the standard for efficiency, ease of use, and high-current handling. The balance leads are integrated into the connector eliminating separate balance wires and connectors as well as external balance boards. The Traxxas High-Current Connector allows current to flow freely with virtually zero voltage loss due to resistance. Large, textured surfaces provide good grip and the reverse-polarity protection makes them virtually impossible to plug in backwards. Shrouded wire connections eliminate the need for heat shrink tubing. Beefy, gold-plated copper terminals with large, spring-loaded contact areas ensure a perfect connection every time. Traxxas iD-Equipped Power Cell LiPo packs use a unique construction that results in a firm, rugged, and compact pack that does not require a hard case. This gives them greater capacity and allows the user to monitor the condition of the battery. Unlike a hard-cased pack, if a Power Cell LiPo "puffs" or softens due to damage or abuse, the user can easily see and feel the change in the pack. Power Cell LiPos are constructed of premium cells with extra-wide discharge tabs to maximize their performance. Power Cell LiPo packs feature low resistance 12-gauge Maxx Cable wire, soldered directly to the LiPo cells to minimize resistance. Traxxas offers the best battery warranty and exchange program available. For the first year, Traxxas will replace any battery found to be defective at no cost. After one year, any Power Cell LiPo battery can be exchanged for a new equivalent for just 50% of the pack's retail price.