From reading other websites I believe there are only a few major manufactures of the typical lead acid batteries. The key is to get a fresh battery. I have used most brands throughout my life and have settled on Fleet Farm for all my car & boat batteries.
For the last 10 years I have run a 24-volt trolling motor with 2 trolling batteries. I also use one of my trolling batteries to start the big motor and power accessories. My batteries typically last about 5 years in the boat and 7 years in the cars, although I did recently have a battery go out after just 3 years. I never had a gas kicker so my batteries do get used quite a bit. Usually the battery connected to the big motor and accessories does not need charging — the big motor’s alternator keeps it’s battery charged when running from spot to spot.
I do charge my batteries after every use with an old fashion charger and make sure the water level is good. So far, I have not found a reason for going to an on-board charger, expensive batteries, or 3rd battery for starting my 70 hp. If my fishing style was different or if I had a 150 hp + motor, I may consider a separate battery just for starting and onboard chargers.
I like to keep things as simple as possible.
Dave Gulczinski