alright i have given into the temptation and would like to try lithium, however i have a 400 amp alt with an internal voltage regulator and was wondering if i can run it at all with my current alt, not looking to get get voltage up just get some serious AH. would i have to use a charger? or would i be better off finding batteries that are the right voltage to charge right off the alt? what would be better for long play time at shows doing demos all day?