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  1. #1
    Member
    Join Date
    Jan 2018
    Location
    Pennington Minnesota
    Posts
    57

    Lithium starting battery for Merc 25

    Thoughts on using a 100ah Lithium trolling motor battery for my river boat.
    Can I use a non starting lithium for a small 3 cylinder efi 25 mercury for starting or will the amp draw for startup kill it?
    2000 Javelin 18 Venom
    2002 Javelin MSX 21 Walleye boat

  2. Member
    Join Date
    Dec 2021
    Location
    Grover NC
    Posts
    709
    #2
    I wouldn't use a battery that wasn't designed for starting. It's going to have a spike that will probably shut down the bms, or even damage the battery.

    I *think* lithium batteries designed for starting have capacitors to help with the load. I use an Ionic for my trolling motor. When my cranking battery dies I'll be getting an Ionic to replace it.