G gudurur New member Sep 22, 2010 #1 The 10v rechargeable battery is for Lego Mindstorms. I didnt buy an additional transformer because I have a transformer which already has a 9v or 12v dc output.
The 10v rechargeable battery is for Lego Mindstorms. I didnt buy an additional transformer because I have a transformer which already has a 9v or 12v dc output.