Originally Posted by DickiedooFlagman
If you are going to replace the battery (a good idea), choose a good one, like Trojan deep cycle. And purchase the largest one that will fit into the available space - a group 27 or group 31. And best would be two 6v deep cycle batteries wired in series to give 12v and double the Ah. Space providing, of course.
Two six volt batteries in series will not double the AH; it doubles the voltage.
Two 12 volt batteries in parallel
will double the AH, but not the voltage.
Two 12 volt batteries with 100 AH each, when piggybacked (Parallel Operation) will yield a 12 volt "bank" of 200 AH
Two 6 volt batteries of 200 AH each when connected in series will yield a 12 volt bank of 200 AH.
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