1x4s battery and it performs better and faster than the Traxxas E Revo 2.0 which needs 2x3s (6s) batteries! Its tougher than any other out of the box RC Truck or Truggy available to date, even its Bigger brother the XMAXX 8s has no chance competing against this little puppy in either department... Well done Traxxas... 😁👍💦Oh yeah WATERPROOF ELECTRONICS TOO!💦💦💦💦💦💦💦💦💦💦🤣🤣💦💦💦💦💦💦