Racers Edge 25C 5000 mAh 2S1P LI-Poly Battery with Traxxas High Current Connector. This battery is a direct fit into all Traxxas electric vehicles, including the Slash, e-revo, and VXL series. Racers Edge battery is lighter than traditional Ni-Cd or Ni-Mh batteries while offering improved performance and run times. It uses the same balancing connection as Align or Electrifly chargers. Be sure to use a voltage cut off if your speed control doesn't come equipped with one. ONLY USE A CHARGER SPECIFICALLY FOR Li-Poly cells!!! Includes free charging bag.