If you want it to run off 12v be able to charge your hump packs for your smelly things and your transmitter and nicads nimhs and lipo to be able to cylce and discharge the perfect charger for you is the orion advantagecarbon edition. I have one really good charger only ever had one problem with it but that was beacause i got it wet lol
http://www.microtechracing.com//prod...S&cat=CHARGERS
A