Buy a better battery, and hopefully better charger. Find your local hobby shop for direction, or go online to a site like EBay. I'd recommend my battery and charger, both Duratrax Onyx Series. Look for a 5000MaH battery - I've charged mine for 45mins and run for over an hour almost every time.

Let me know what kind of connector your current battery has either with a picture or description and where you would like to purchase it and I can give you item #'s or links to what you are looking for <br type="_moz"/>