I have 2 conventional lead acid batteries. Both identical marine deep cycle form Interstate.
I do not have a battery charger on board other than the alternator on the engine.
I run off the front battery all season - only switch to the back battery on over night races and only after the instruments tell me battery power is low (they stop working)
I bring them home in the winter and charge them before putting them on a shelf. I charge them again before putting them back in the boat in the spring. Batteries last about 10 years
