May I add a few comments?
First, you should NEVER use tap water in a battery. Especially FLORIDA water with clorine in it. Use DISTILLED WATER. Available at Walmart in gallons.
If a battery is heavily Sulfated it is probably a gonner. The internal cells may be shorted out. (see below)
If the batt voltage reads very low they will need more than a charge. They will need a "Kick in the Butt" BOOST!..to get them to start taking a charge.
Battery's charge on amperage (current) not voltage. You need to push as many amps into that battery as the batt will take. Initially, a 12V charger set to max amp output on ONE battery at a time MIGHT do it.
40 amps at 12v would be better. At less than 10 amps, your just wasting your time. The batt will take forever to start coming up, if at all.
If (hopefully) your batts do charge, I would recommend checking voltage at each cell (Cells...not battery) to confirm you have no dead or shorted cells within a battery. This is not difficult to do. If anyone is interested I will post this proceedure in a later post. You will need a voltage meter with long probes, that reads DC volts.
Hope this helps.
Dave
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