rhagfo wrote:
I believe that keeping a constant charge going is harder on a battery than letting it discharge slightly over several months, then putting back on the charger when being used.
It depends on the actual charging voltage but in general your belief is wrong.
A tender type automatic battery maintainer is much better than just leaving it sit......for periods more than a month or so.
And for the OP:
1.5 watts isn't enough capacity to do much good.
Something on the order of 15 watts with a "smart" controller is much better.
Northern Tool has several different models.