Don't forget about not setting batteries on concrete as it will drain them because earth is ground
There is some truth to that. Not so much as the earth is ground but concrete generally has a dampness. Supposedly a battery that is wet from the dampness allows a conductivity between the posts causing a minuscule draw.
That was true back in the old days when batteries didn't have plastic cases.
What were the cases made out of? I know of rubber and possibly bakelite. Both just as good or better insulator as plastic.
The biggest threat when storing a crank is rust and damage from getting knocked around. I spray mine with cosmoline and made storage crates. Of couse this is only ones im putting in long term storage.
