"Shortly after the introduction of pulse-chargers for nickel-cadmium batteries, we (at the Exide lab) tried the same thing with lead-acid batteries. It turns out that the lead acid battery, or even just bare lead grids suspended in acid, acts like a giant capacitor. A car battery may have an equivalent capacitance of several Farads! Therefore any pulse or spike that we attempted to introduce was absorbed by the capacitance effect and had no effect on the battery. The purpose of the experiments was to try to find a way to charge electric vehicle batteries rapidly. A starry-eyed researcher I knew was hoping for a 5 to 10 minute charge! One difficulty would be the amount of power required by the charging station. Considering that an EV battery could have a capacity of 200 amp/hours at 120 volts, in order to charge it in 10 minutes the charging system would have to supply over 1,200 amps at about 150 volts. That's 180,000 watts! A single charging station, with maybe 8 bays, would require as much power as a small town! In any case, we never found a way to rapid-charge a battery without killing it after a few cycles."
Yep. There are no shortcuts. I can tell you from personal experience that tetra sodium EDTA does NOT work. It just kills weak batteries. Sodium sulfite on the other hand DOES work. Epsom salts do NOT work, either.