NOCO Jump Pack

  • suzuki
    Woodbury, Mn
    Posts: 18805
    January 21, 2025 at 11:46 am #2312044

    Because of this thread I just brought by GB70 in to top off the charge and it was still full. Its been a long time since I topped it off. I never get to use it but its nice knowing it’s there.

    gim
    Plymouth, MN
    Posts: 18284
    January 21, 2025 at 11:54 am #2312049
    suzuki wrote:

    Its been a long time since I topped it off. I never get to use it but its nice knowing it’s there.

    I am amazed at how long those things can hold a charge. I charge mine up about once a year and it always has almost its full life when I do it.

    I’ve never used mine either.

    jwellsy
    Posts: 1625
    January 21, 2025 at 8:25 pm #2312170

    I don’t think a jump pack cares what kind of battery it’s jumping.

    I’ve got an Interstate Battery brand jump pack. It’s saved me one time so far.

    Reef W
    Posts: 2936
    January 21, 2025 at 9:24 pm #2312182
    jwellsy wrote:

    I don’t think a jump pack cares what kind of battery it’s jumping.

    The warning is to not jump something with a lithium battery. If the BMS can’t handle it you’ll fry it and the battery.

    jwellsy
    Posts: 1625
    January 22, 2025 at 6:24 am #2312198
    Reef W wrote:

    The warning is to not jump something with a lithium battery. If the BMS can’t handle it you’ll fry it and the battery.

    I agree that you wouldn’t want to use a crazy high voltage source. But if your jumping a 12v battery with a 12-13v source, what difference does battery chemistry make?

    Reef W
    Posts: 2936
    January 22, 2025 at 7:06 am #2312201
    jwellsy wrote:

    I agree that you wouldn’t want to use a crazy high voltage source. But if your jumping a 12v battery with a 12-13v source, what difference does battery chemistry make?

    I don’t know the exact mechanism of why it’s different but something to do with the amperage, not the voltage, it seems. A jump start is dumping a lot of current that should go to starter but is also connected to the dead battery so my guesses would be the circuitry of a BMS can’t handle it while a lead-acid doesn’t have that. Or maybe something with internal resistances that a lifepo4 actually takes in that current and a lead-acid doesn’t.

    Noco does say that some lithium started batteries can be jump started, like their own motorsport batteries, but it otherwise depends on if the battery supports it or not and I don’t know how you determine that.

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