The boat yards here on the lake sell Exide and the owners go through a lot of them, some a new set very year. I'm sure poor maintenance has something to do with it, but I have never heard anyone say they were happy with the longevity of them.
I've used Delco Voyagers for years and had good results. Everyone has there are favorites.
2015 Seaark 1872 MV CC Etec-90
Helix 12 CHIRP SI, HB 1199, MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner