Wet cell car type batteries.Back in the 1950's or 1960's,I read in one
of my Popular Science or Popular Mechanics magazines if you will drain
the acid out of the battery into a porcelain or glass container and
flush the crud out of the battery with a water hose (no nozzle on the
water hose and the water turned on at low pressure) and then pour the
acid through a piece of cloth (to filter out crud in the acid) and pour
the acid back into the battery,that will extend the life of the
battery.Pure Sulphuric battery acid has a chemical burn equal to 735
degrees temperture,same as a red hot poker at 735 degrees.I used to work
at a factory that manufactured auto/truck/lawnmower batteries and
believe you me,,, I do know about that pure sulphuric battery acid! One
drop of it on your hide will make you jump ten feet high! The acid in
the car type batteries is very,very watered down.
cuhulin