HDK onboard charger not charging batteries

sloar

Hopefully someone here can help me. My batteries started dying last summer, they wouldn't charge. I recently picked up all new batteries and installed them. My kids rode the cart around for awhile and the readout said 50% on the charge. I plugged in the HDK onboard battery charger and it doesn't seem to be charging the batteries, 24 hours later no difference in charge. A solid red light on the charger panel which means charging error. Any thoughts or ideas to get me started in the right direction?

BGW

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scooterman

Do you have the manual for it? If so what does it recommend?

sloar

I think I figured out the problem, when I try charging it I get an error code saying the batteries are to weak for the charger to take over. I tested each battery with a multimeter and get 8.4 on each. I read that each one needs to be around a 9. I’m trying to charge each battery individually, I can get them to a 9 but they slowly drop back down around 8.6 while I’m charging the next one. Any ideas on that?