Re: Another Battery Question:

Posted by Jon H on January 04, 2005 at 08:19:11 from (69.26.16.245):

In Reply to: Another Battery Question: posted by Dick on January 03, 2005 at 22:53:30:

The only reasonable explanation for why this would happen is that a battery sitting on concrete will lose heat to the cool concrete.A battery that is cooler than the surronding air will "sweat" and cause the battery top to condense moisture from the air,both inside and outside the case. Any but a freshly cleaned battery will have a layer of sulferic acid on the internal and external surface of the battery top.If this layer is dry,it will not conduct power and discharge the cell.If wet with condensation,it will conduct a bit of power across the battery top to the cell connectors and cause a slow discharge. When battery tops were hard rubber with tar to seal the joints,I suspect the wet cover discharge problem was much worse with the porus surface and cracks in the tar sealer to hold acid.
I syspect this wet top problem would not exist with a sealed battery like an Optima or an Exide Orbital with no vents to allow damp air in and no acid layer on the outside of the case.

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