heat isnt the death of battery's its poor maintance, eg. using tap
water instead of de min water, and the worst of all is letting a cell go
dry!
vibrations wont play a big part in the death of a batt till later on in its life.
on the heat issue, did you know that if you flattened a car batt
you can get it to self charge, maybe enough to get you going, by
heating it up!
i have proved this once myself, also say it on abc tv show
bush mechanics.
phil



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