Trolling Motor Question.

I have a real small aluminum boat and I use an equally small motorguide
trolling motor. The battery I used was brand new but only lasted a couple of
years. The battery was a Marine Battery.

Am I better off just buying a regular car battery or should I stick to the
Marine battery? Frankly, I don't know the difference. When I used a regular
car battery, I think it's life lasted longer than the Marine battery.

Any help would be greatly appreciated. (The car battery was from a small
Toyota Tercel).

Frank