Marine batteries

  • Brian Belcher
    Posts: 1
    #1688803

    I have a 2005 Lund with a 175 hp evenrude. I want to make sure that the cranking battery is the right size. I noticed that one of my gps runs off this battery as well as the main power to the lights, ship to shore radio and a few others things. Anyone with experience please reply.

    biggill
    East Bethel, MN
    Posts: 11299
    #1688818

    Biggest you can fit. Go with a deep cycle too. Most are rated for cranking as well.

    CaptainMusky
    Posts: 19697
    #1688821

    It may also help you you run power straight from battery to your GPS unit instead of through the fuse block. Agreed, as big of a battery as you can get in your compartment is best otherwise.

    puddlepounder
    Cove Bay Mille Lacs lake MN
    Posts: 1814
    #1688890

    group 31 deep cycle AGM if it fits. my gp 31 agm has over 1100 MCA to start my optimax. direct wire all sonar/gps units to the battery with fuses. running them into a fuse box is easier for the install, but this creates more resistance when starting and can/will draw down the sonar/gps and it will shut off and you will have to reboot it every time you start the main motor. this mostly happens after a battery is a few years old and is starting to loose power.

    John Shear
    Chippewa Falls, WI
    Posts: 205
    #1689343

    You might see if your motor has a minimum requirement for CCA or MCA. My Optimax requires a min 800 CCA or 1000 MCA so it needs a hefty battery. I use an Optima 27M and run 3 sonar units, structurescan, NMEA with Point-1, and occasionally livewell and I’m usually out all day when I’m out. A 31M would be better but that’s too tight a fit in my compartment.

    One
    Posts: 100
    #1689353

    Anyone try Duracell yet?

    poomunk
    Galesville, Wisconsin
    Posts: 1481
    #1689367

    Anyone try Duracell yet?

    Duracell marine batteries are re-labeled East Penn batteries so ought to perform just like any other re-labeled easy Penn battery.

    I was going to go with Duracell but a well timed sale and mail in rebate pushed me to farm and fleet (also a re-labeled East penn).

    dld24
    Posts: 347
    #1689511

    Anybody known if Duralast batteries are made by Interstate? I went to autozone today and picked up a 29 deep cycle and the guy that worked there said they are.

    poomunk
    Galesville, Wisconsin
    Posts: 1481
    #1689526

    Anybody known if Duralast batteries are made by Interstate? I went to autozone today and picked up a 29 deep cycle and the guy that worked there said they are.

    He is right in a round about way. In that durolast and interstate are both made by Johnson controls, so they are the same battery, just not ‘made’ by interstate.

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