Yea I probrably should have been more specific the batt. will only go in AJs E MAXX. I had some 7 cells made at or local hobby shop, AJ did a cool jump and the 7th cell fell off.I tried to fix but seems like I could not get it to hold on tight. Maybe I should go with assembled packs.

Whats a good brand for the money? 3300-3700 mah.

Do you have to do any coversion to switch to lipo?