Battery Charging Question
I think there are a few different issues here. 1st, think about how much you really use or need your battery. If you''re a day sailor, you might need it for running lights about once or twice a year. A hand-held VHF solves your comm problems. 2nd, small batteries only need small (6-10 amp) chargers. I have a group 27, 85 A/H battery, and it only takes about an hour to charge it up. You might want to invest in a Guest, 3 stage charger, and plug it in as you''re preping the boat, and/or while putting her away. You can go about 4 weeks between charges. My guess is you might have boiled off the electrolite in both your other batteries by leaving the big charger connected full time. And last, you can''t expect a $50 battery last too long.