Marine batteries aren't cheap, so maintaining them properly thereby granting them a long, healthy life.
Battery upkeep isn't a tedious task; in fact, it doesn't have to be done at all! By merely taking good care of your battery, you'll be sparing yourself all the work down the road.
Avoid totally discharging wet-cell, deep-cycle batteries as well as avoiding quick charges that creates more heat than the more desirable trickle charge. Promptly recharging your batteries immediately after use will extend their life and also avoid the problem of stepping on the foot pedal of your trolling motor and being reminded that you forgot to charge the batteries after the last trip.