[Shop-talk] AGM batteries: Protect from freezing?

Moose eric at megageek.com
Fri Nov 14 08:20:15 MST 2025


Bob ponders...

>"don't store batteries on concrete"

This is one of those things that once were true, but aren't anymore.  I 
think we even talked about it here before.  I watched a good youtube video 
on it.

Turns out that older car batteries used a different type of casing 
material that allows leaching of the chemicals in the batteries (or at 
least of the charge) if it was in contact with the ground for long periods 
of time.  However, since batteries have been made with modern plastics, 
this is no longer the case.  I still don't do it, but mostly because if 
the battery's case cracks or something, I'd rather have wood under it to 
absorb the chemicals than it etching my concrete.

Moose

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