This is the Traxxas 14.8V 4S 6700mAh LiPo with ID Connector for use in the X-Maxx 8S trucks, or in the Unlimited Desert Racer for 4S power.
4S - 14.8 Volts 25C Sustained 50C Burst 3C Charge
Traxxas takes battery power for your X-Maxx to the next level with new 4-cell LiPo battery. The 6700mAh capacity and 50C burst discharge rate deliver the power, performance, and runtime worthy of the X-Maxx. Checking in at over 30-volts in 8s configuration, Traxxas 4-cell LiPos will stand X-Maxx on its wheelie bar and have it catching massive air as fast as you can grab the throttle. Built using the same sturdy construction methods as the Traxxas 2-cell and 3-cell batteries.