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How long shoud a boat battery last

Old 06-21-2015, 04:20 PM
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Default How long shoud a boat battery last

My boat is a 2010 and I still have the first battery, is this typical, seems long to me, especially considering winter storage. Also what are good replacements, though I will likely replace with the same brand.
Old 06-21-2015, 04:23 PM
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That battery is on borrowed time. It may be over kil but we replace every 3 years. I use hi tech that I get through my automotive battery distributor.
Old 06-21-2015, 04:24 PM
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Average of a well cared for battery is 4 years. If I am doing critical boating, such as an ocean crossing, I will replace at 4 years. Otherwise, if I am near shore, and have several batteries, then I will let them go until there is sign of failure. I have one set of starting batteries which now are going on 8 years. Some folks can get 10 years out of well cared for batteries.
Old 06-21-2015, 04:26 PM
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You never mentioned the current type battery, lead acid, agm etc... also you get longer life using a desulphating battery charger. All digital Schumacher are desulphators, as I called them and verified that--their analog aren't.
Old 06-21-2015, 04:26 PM
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My 2006 batteries are still going strong. They sat for six months and still had enough in them to fire the 225 HP outboards.
Old 06-21-2015, 04:31 PM
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Boat batteries is something I don't gamble on at all. Trolling motor batteries, yes but not house and cranking batteries. I buy very good batteries and replace them every two years. No doubt they are still good, best time to replace them IMO.
Old 06-21-2015, 04:44 PM
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Expensive batteries are a bunch of bull. I buy Walmart batteries and my last two went 6 years and the other 9 years. For $80 and full replacement guarantee they cant be beat. I use my boat every day the wind allows and put 300 hours on them in 6 months then they sit for 6 months. I have a buddy who buys the expensive marine di hards and they don't last 1/2 the time mine do.
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Old 06-21-2015, 04:44 PM
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Originally Posted by Sneaky Snooker View Post
Boat batteries is something I don't gamble on at all. Trolling motor batteries, yes but not house and cranking batteries. I buy very good batteries and replace them every two years. No doubt they are still good, best time to replace them IMO.
How do define "very good batteries"?
Old 06-21-2015, 04:48 PM
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If you talk to your local boat dealer or Marina in most cases they will say 2 to 3 years. I just replaced mine after 7 years just because I figured I just should. They were West Marine group 27. Guess what I replaced them with. FYI, they are always on a charger during the winter or when my boat is in my slip.
Old 06-21-2015, 04:49 PM
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Lol. I'm trying to get a pair of 4/13 yr batteries to charge as I text this with a Schumacher charger. These are the cheap ever start batteries that were in the boat when I bought it. Took the caps off and it took 4 bottles of water to fill the cavities up. Hope this helps them take a charge.
Old 06-21-2015, 05:02 PM
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My starter battery went out this spring, original to the boat so ~7 years old. The house battery was/is still going strong....both interstate.
Old 06-21-2015, 05:13 PM
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I get new batteries every 4 years. I use the group 31 die hard platinum. They have a 3 year warranty figure if I go one year past that I am good. Plus fishing 70 miles offshore I don't want any problems.
Old 06-21-2015, 05:14 PM
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Originally Posted by v70cat View Post
How do define "very good batteries"?
I think there are a LOT of good batteries. Actually I also have had good luck with walmart batteries in some vehicles. My battery of choice is Deka. But as I said, I think there are a lot of good batteries. I always find buddies eager to get the batteries I remove.
Old 06-21-2015, 05:32 PM
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I love these type of posts... So the answer is ~2-10+yrs... Your experience may vary For some reason my Boat batteries seem to outlast my Car/SUV batteries...
Old 06-21-2015, 05:45 PM
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Originally Posted by Reel Stamas View Post
I love these type of posts... So the answer is ~2-10+yrs... Your experience may vary For some reason my Boat batteries seem to outlast my Car/SUV batteries...
LOL, you are right. Now, what brand of oil is best ?????
Old 06-21-2015, 05:50 PM
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I'll say this. I have two batteries (both cranking batteries) on my 28' Mako that came with the boat brand new in 2007. They are still running strong at almost 9 years old.

However, I just had to replace the cranking battery on my flats boat at less than 2 years old. It wouldn't hold a charge anymore.

So it really does vary.
Old 06-21-2015, 06:00 PM
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Mine are 2011 batteries, I know the house battery is about done. Bought the boat used, and it was a northern boat so I suspect that the batteries had a rough time in winter.

I can run down the house to 11 volts in about 20 min with just GPS/Sonar and a livewell pump.

With twins and each motor having it's own cranking battery, and switches that let me parallel any or all of the batteries, I see no rush to replace the cranking batteries as long as each engine cranks strong. If one dies out 70 miles of shore, I still got 1 motor and I can merge and crank the second over. or limp home on 1 motor, doubtful would ever come to that.
Old 06-21-2015, 06:04 PM
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Originally Posted by Sneaky Snooker View Post
I think there are a LOT of good batteries. Actually I also have had good luck with walmart batteries in some vehicles. My battery of choice is Deka. But as I said, I think there are a lot of good batteries. I always find buddies eager to get the batteries I remove.
I just replaced a pair of 12+ year old Deka Group 31 AGM batteries this past winter. Not because they were bad, but because they were showing some weakness.

I replaced with identical. $189/each.
Old 06-21-2015, 06:08 PM
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Originally Posted by highflier1 View Post
I can run down the house to 11 volts in about 20 min with just GPS/Sonar and a livewell pump.
That must be some pump! - either that or something is wrong - I would take a closer look.
Old 06-21-2015, 06:23 PM
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Originally Posted by The Spit View Post
I just replaced a pair of 12+ year old Deka Group 31 AGM batteries this past winter. Not because they were bad, but because they were showing some weakness.

I replaced with identical. $189/each.
Dayum, maybe I should use them a bit longer ;?

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