
: This topic was beaten to death a year or so ago.

: The concrete is not the problem. 

: Lead-acid batteries often fail from disuse (not being charged for a long
: time), but there's no way the concrete floor could be the cause of the
: problem.

Ditto. The only remote, and I do say remote, possibility is that if the
ground was REAL cold (< -30F) the battery might freeze an split. But then
it would probably freeze anyway :-)