Dual batteries or jump box?

Discussion in 'Sport Boats' started by Jeff h, Dec 5, 2017.

  1. Espos4

    Espos4 Active Member

    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    Dual batteries are one of the simplest upgrades on a runabout.
    1 Battery
    2 Cables
    Possibly a new master switch (If the boat doesn't have one or the current switch doesn't have 2 positive posts)

    For me, 2 batteries are a "must"
  2. Tom W

    Tom W New Member

    Dec 22, 2017
    Lakeland florida
    Thank you all for your replies. I was beginning to think maybe the new sea rays were using solar panels in their Bimini for their music systems I agree a backup system for starting the engine is a no-brainer.
  3. northern

    northern Well-Known Member

    Jan 17, 2007
    West coast Vancouver to Alaska
    380 Aft Cabin 1989 GPS and Charts by Nobeltec
    Twin 454 strait shaft
    I had a jump battery on the boat once. It had 120 volt outlet. I tried to use it as power source for an electric blanket all it did was make to power cord hot. If you get a jump battery all it is good for is charging cell phones and starting the boat. It also become a projectile in rough water. If you get a second battery installed by the dealer it become a true source of power for all on your boat
  4. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    Good one!

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