i have a 1996 jeep grand cherokee / 200 amp alternator /two yellow top batt/ have two 18" kicker solox's but going to put two more in walled don't know what amps i'm going to run but right now i have 2 ma audio hk802sx's alot of people say i can put 14 volt batteries in my car with out frying it but i don't know if they know what they are talking about