Re: 9 volt system
I think the 8 volt batteries were originally designed to power 32-volt golf carts. You put four batteries in there and the motors would work for a long time before needing a charge. There were a lot of farmers that used 32-volt systems in their homes with a wind charger back in the 30s & 40s. My Grandad had a set up like that til just after the war. It would run the radio and a few lights and back then that was all they needed. Most folks back then didn't stay up too long after the sun went down.
They have been used as a crutch on old deteriorated 6-volt systems since Christ was a corporal.
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