Any Autozone blows. i was trying to buy one of those jump booster battery packs once and i asked them how many amps it was. The guy said it is not used for charging. I told him i know but i need to know how many amps it has. He said none it's 12 volts and he gave me the duhhhhhh! look. So finally i asked him what do you think cranks the starter over, just the voltage? And get this he goes "ya" I said no stupid it's cranking amps, why do you think all the other car batteries here are rated with CCA and not voltage. An get this, the guy i was arguing with was the one with the white shirt with the name "manager" not the pleabs with the red shirts. I mean come on, he's the head honcho and he doesnt know ampereage? That's even worse than the hi/lo kid who didnt know what a quadrajet was.