This battery spent the first 7.5 years of it's life in my fishing boat, as a starter battery for a 75 Merc four stroke. It was rarely on a charger, and the boat would go unused for long stretches, particulary in the winter. Generally, it was very reliable, considering the neglect it was seeing. I probably had to jump start it two or three times over the years.
The battery in my Yanmar 2210 gave up the ghost last year, so I moved the fishing boat battery to the Yanmar, and replaced the fishing boat battery with new (better to be be stuck with a bad battery on a tractor than a boat).
As the weather started getting colder in the fall of 2020, the battery started to struggle starting the Yanmar. I finally had to replace it earlier this month.
Eight+ years of service. Pretty darn good, in my book.

The battery in my Yanmar 2210 gave up the ghost last year, so I moved the fishing boat battery to the Yanmar, and replaced the fishing boat battery with new (better to be be stuck with a bad battery on a tractor than a boat).
As the weather started getting colder in the fall of 2020, the battery started to struggle starting the Yanmar. I finally had to replace it earlier this month.
Eight+ years of service. Pretty darn good, in my book.
