So you're telling me you think that a car battery with a CCA rating of 650 has 650Ah of capacity????

You've got to be kidding!!!

The CCA amp ratings are based on something like a 30 second current draw. There's no way the CCA rating = the Amp-hour rating of the battery!

Hell, if your car battery had 650Ah of capacity, you could charge 40 5S 10Ah LiPo packs on a single charge!!