Thanks for answering. Actually I upgraded the ESC and motor today but with the nickel metal hydride battery that I already have it doesn't have much more speed I would like to upgrade to a 3s lipo. The 3s lipo and charger from Traxxas is available at the hobby store is $200 which is too much. Can you recommend an alternative? I mean a suitable lipo 3s with a compatible charger? I would appreciate the help since I'm already invested in this thank you very much. George