Posted by Texasmark1 on January 15, 2012 at 14:00:00 from (67.142.164.27):
In Reply to: Re: 6 volt in series posted by Goose on January 15, 2012 at 08:22:29:
Reason why is ohms law. On two 6's in series, the internal resistance of both batteries adds arithmetically and when cranking a portion of the available terminal voltage is dropped across this resistance and is not available for the starter.
On parallel 12v batteries, the resistance is halved and the current is halved so you wind up with a 4x gain in loss reduction meaning that you get the performance you mentioned.
I did a 4230 that way and could start it in any kind of weather with no assistance of any kind (heater-ether).
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