re: Golf cart battery help

Incorrect. You want to charge them fully and then take them off the charge and let them rest for a cpl hrs then test them.

If one is low it will stop the others from fully charging and will drag them down like the poster above said.

You can try charging just that one battery if you have a stand alone charger to try to get it up to the other batteries.

It may be toast. You really shouldn’t replace just one in the set because the others will drag down the new one.

If your looking to replace them take a look at roypow lithium batteries. Cost more but comes with a list of advantages that make it worth it imo.