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Larry

wrote in :

When you crack the case of an AGM, however, it does not leak acid like
a flooded battery. Even batteries that are tied down sometimes break
free in a capsize, or rough conditions. And if something else is
thrown against them hard enough, that may also release the contents.

If you crack open an AGM, the plates will probably touch and any acid that
may have leaked will be a moot point after the explosion of all the other
cells....