Frank.... thanks for that explanation...first time I've heard it put so clearly.
I have an 03 Club Cart, reman in 06 by the now defunct Golf Cart Connection. I just got my 3rd set of batteries in about 6.5 yrs of use. I do use it a lot ...about 100 miles a week. I have always had initial problems with the 2nd battery behind the driver seat...so, my symptoms sound similar to OP and your diagnosis.
I have a voltage tester and "high end" hydrometer. 2 batteries had one bad cell each but the other 4 tested beautifully. Given they were 2.5 yrs old I elected to replace all of them (Trojan T-875).
How much do you charge for the voltage reducer? Might be a good investment now with a new set of batteries to make sure they last equally.
Thanks to OP and Frank for bringing this up.
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Maryland (DC Suburbs) - first 51 years
The Villages - next 51 years
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