Year 6 on my Costco Marine batteries (2 batteries setup). I take them out of the boat for winter and trickle charge (0.5 amp) once a month while inside. Think they cost a little north of a C-note.
Same here. 2 Costco batteries get abused during the summer, sit all winter, then put on a charger in the spring. I’m surprised they’ve lasted the 4 or 5 years I’ve had them.
At this rate that $400 batterie better last 20 years.
