marine batteries

[kezsr]

going to replace mine in the off season,we have had the boat with the same batteries for 4 years,were the batteries in the boat when we got it,what is the average lifespan of these batteries and was wandering how often others change out before having a problem?

[IrishAyes]

I use a battery in the boat for two years, then it is replaced. I have two batteries in my system and therefore, I have one new battery every year.

I know I can get a lot more use out of the batteries in the boat but why take a chance. I use the batteries at home for other application where it doesn't matter as much if I get stranded with a bad battery.

Four years is probably the critical point where a battery will begin to show failure. I just don't want that to happen while I am 25 or so miles off shore. 

[The Broken One]

Good points and info from Irish Joe.... I have dual optima's and feel totally confident in them

[Luna Sea 5]

my batteries died during my 4th season.. so you need to replace them before your next.

[Still Running]

I would replace them every 2 - 3 years in a boat.

[sealife]

Two batteries in boat and replace one each year.

[miller-time]

I won't go more than 3 years on batteries but usually replace them in 2. The water can be a dangerous place if you get stuck without power. Why take the chance and save only $150..