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So here's a first update. Just checked on the battery that's been charging for the past 5 hours. I took the charger off and the battery is reading 12.3 V. I'll check again in the morning to see if it holds. The concerning thing is the battery is very warm to hot. You can hold your hand on...

I have seen what you're referring to and am going to give it a try. I just 10 mins ago connected an Optima D1200 charger. No need to trick the charger into powering up with a parallel connected good battery. It currently says that its "conditioning" the battery and the voltage and amperage...

Has anyone tried the Optima D1200 or D400?

I've got the time, the patience, and will have the proper charger as of tomorrow. At $237 apiece for new Optima D51r batteries it'll be time well spent. Thanks to all for your input. -Craig

I picked up a super clean 802a today from a member here. The batteries have never been used as the cable ends were taped over and one of the positive posts still had the red plastic cap that you have to break to get off. The 2 yellow top 51r's are showing 1.6V each. The set was built in...

LITD, So when using this charger, can you confirm that the batteries are still interconnected with each receiving an independent 12v charge? Thanks, -Craig