[Healeys] batteries

[healeymanjim]

i have changed many batteries over the years, both for cars and golf carts.  its seems to be a law that they only last about 5 
years tops, no matter whether the most expensive or the rebuilt ones from the battery recycler.  have never used the dry 
cell type so cannot compare.  what is there to a battery but a case, lead plates and acid?   where do they go bad other than 
in a cell?