Jim wrote in news:zpHrg.1717$vO.610
@newsread4.news.pas.earthlink.net:

He said two 6v 220 amp batteries will give 12v, 440 amps.


Nope....nice dream, though. Two 6V 220 AH in series gives you 12V at
220AH, not 440 AH. It's still only 220AH, just the voltage doubled. The
plates didn't get any bigger in the cells when you connected them in
series.

You can get 440AH at 6V by parallelling them....doubling the plate area....