[Dratheus]

The NiMH batteries hold a longer charge than the Nicd do.I also believe they pump a little more power to the motor. I bought a small dual battery mod kit off of Ebay. It contained 2 NiMH, extra hook-up wire, a 4 AA cell battery pack, heat shrink for the second battery, and a NOS sticker..hahaha. Also for a dual battery mod you would be better off removing the charge station from the controller, and rigging it up to another power source. (ie: the 4AA cell batt. pack) The 2AA that are in the controller don't supply enough juice to properly charge a dual battery car. You won't have the timing LED to tell you when to take the car off of the charger so don't charge the dual batt. car on a stand alone charger for more than 2 minutes.