on the "other" forum. He's installed and followed a lot of deep cycles. There seems to be some debate as to the value of the most expensive compared to the least expensive.

One thing I read was one mans dead battery, is several more seasons for another.

The thing that I've seen over the years when I have several deep cycle batteries onboard, is they do serve notice in advance compared to the newest battery in the lot on my boat. I can tell the age, in relation to each other, of the 3 at a glance with a voltage meter.

The problem is figuring out the season before,... they're not worth keeping.