2869X Traxxas 7600mAh 7.4V 2S 25C LiPo iD Battery is ideal for all Slash, Summit, E-Maxx, E-Revo and X-Maxx models. Traxxas Certified iD Power Cell Lipo batteries offer the ultimate in power "punch" and runtime with the highest possible capacity and voltage for reaching the top speeds that Traxxas models are built to achieve. Available in a full range of capacities in 2-cell (2S) and 3-Cell (3S) configurations the Traxxas iD Power Cell Lipo batteries are engineered for a perfect factory fit specifially for Traxxas models to maximize their full performance potential. Due to their unique chemistry, LiPo batteries MUST be charged using a LiPo specific charger. TRAXXAS CERTIFIED LIPO POWER! The most speed and run time available! We take the guesswork out of going fast!