Just me. I buy my marine batteries from Wal-mart, 2 for trolling and of course one for cranking. I store my boat in a building with no heat but with electricity. I have an on-board 3 bank charger and when I get off the water I immediately plug her up and leave it plugged up until the next time I go out. It stays plugged up all winter. The reason I go with WallyWorld is the price and if it doesn't live up to it expectations within a year or so I have no problems going in and switching out, no questions asked and receipt required. Over the many years it has only happened a couple times. My cranking battery last approximately 4 years, thats as long as I'm comfortable with. My trolling motor batteries usually starts showing wear about the end of 2 years. Of course the switching out is usually staggered so I dont get hit with a large expense. If I think the battery shows wear I replace. Nothing worse than being on the water and have battery problems especially when it is usually avoidable. Not that it has happened to me. I realize that this might not be acceptable for some but to me it is the cost of doing business when it comes to my boat and fishing. Things changed for me when I installed my on-board charger and keeping the batteries maintained at all times.