Wow.. $30.. I think your workshop must have closed shop by now..
Most workshops carry batteries, and nowadays most use
maintenance-free ones around $100-$150 depending on size. Those
that need water should be slightly cheaper, in the range of
$60-$100.
Apparently those need need water can actually last longer than the
maintenance-free ones with proper care, but of course, if you
forget to add water.. then
