The battery idea sounds OK, but batteries have lead plates. Dunno if that would work. You could build your own cell... You just need a mason jar, wire, electrodes, tubing, check valves and some hose fittings from what I have read tonight. I am going to build one tomorrow! YIKES.. You could heat your house, power a car or even a tractor trailer with these HHO converters. You can get very technical, but its not nessessary. Simple works.