OK, so now I spent some real, honest-to-goodness, hard earned, difficult to come by, $$$$$. No skimping. The real deal. NEW. With warranty. BATTERY CHARGERS!!!! Yes, I, the ultimate tightwad, the under $500 conversion guy, has purchased something. And it wasn't even at the farm supply store. Their feelings will be hurt. I got 6 Duracell 12 amp battery chargers:
Duracell 6, 12, 25 Amp Battery Charger | Duracell
I think I'm commited to seeing this project through now. I'm out a whopping $117.20 for those things! I think I just doubled my budget so far!