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marine batteries

Discussion in 'Big Boats' started by eianm, Jan 9, 2018. Add this thread to a FAQ

  1. eianm


    Joined Jul 7, 2010
    391 posts, 1 likes
    Hunter 42
    AU Sydney
    Last year I replaced my 8D AGM house batteries after having installed them in 2007. They were the West Marine AGMs made by DEKA- amazing run! So , hadn't thought about my start battery until last weekend when the motor wouldn't start- sure enough, turned battery switch to "ALL" and away we go. Tested my 10 year old West Marine AGM A824M and it was finally dead. Again made by DEKA. my point is - it is certainly worth spending the extra to buy quality - who would have thought you could get 10 years out of batteries in a BOAT!

  2. Nodak7


    Joined Sep 28, 2008
    984 posts, 26 likes
    Hunter 41DS
    US Punta Gorda, FL
    Interesting to note that my start battery was 11 years old and still going strong. I decided since we are heading to the Bahamas this spring I did not want to risk it going bad in the boonies. I did research on this subject and found that DEKA makes the Duracell AGM's as well. I had the Deka Seamate AGM MN 8A27M 580 CCA and found the exact replacement (same size enclosure and rating) with the Duracell Ultra AGM MN SLI27MAGDC 580 CCA. I am certain that you can find the same battery for yours. Yours is a Group 24 rather than 27. And yes it is worth it for 10 years of trouble free service. IMHO

    Last edited: Jan 9, 2018
  3. Benny17441


    Joined May 24, 2004
    5,341 posts, 299 likes
    CC 30
    US South Florida
    A lot of things can happen in 10 years to the boats, the owners and the batteries themselves. Being of a certain age I do not purchase "Green Bananas" anymore. I grew up with wet cell batteries and they have served me well over the years and they happen to be fairly inexpensive in today's times. I equate quality with the length and terms of the warranty and if I can get a guaranteed usage of a battery for two years I'm good and any additional life is gravy. I have had cheap batteries that just refused to die and expensive ones that died very shortly, no guarantees but those afforded by the warranties. A boat is mobile vehicle and a battery failure can and will happen a few hundred miles from where they were purchased and if the retailers do not have multiple locations with one close to where your mishap took place you may as well be out of luck. There is something to be said about Walmart batteries for the coastal cruiser, "you are cruising with a large stock of readily available spares wherever you are". Now that has value. We sometimes spend a few thousand dollars in an extended sailing trip and to incur in delays or missed reservations because you cannot find a certain type of battery to match your expensive bank would be a major inconvenience. I think every boat owner needs to decide which batteries to get according to his type of sailing and other circumstances. If there were 10 year batteries no one can say that your investing in them would be a wise decision all the time. If you want to know about the relationship between cost and performance of deep cycle batteries ask a Golf Car owner.

    Whatfiero1 likes this.