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Jnc660 jump starter failure

Discussion in 'Mechanic and Repair' started by ed2hess, Sep 18, 2019.

  1. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 16,370

    Charging complete green light on. But the available voltage is 12volts when I push red button. And that is only 20percent charge.??

    KIMG1531.JPG

    KIMG1532.JPG
     
  2. rlitman

    rlitman LawnSite Silver Member
    Messages: 2,426

    How old is it? It probably just needs a new battery.
     
    BigFish likes this.
  3. BigFish

    BigFish LawnSite Fanatic
    Messages: 5,810

    Isssat covered in owners manual ?

    Didja call/ contact the mfg. ?
     
  4. OP
    OP
    ed2hess

    ed2hess LawnSite Fanatic
    Messages: 16,370

  5. BigFish

    BigFish LawnSite Fanatic
    Messages: 5,810

    No ! Probably uses nickel rechargeable batteries.
    Call the mfg.
     
    Breezmeister likes this.
  6. rlitman

    rlitman LawnSite Silver Member
    Messages: 2,426

    All the JNC's I've seen use an SLA battery. I still wouldn't test it with a carbon pile though.

    If you like HF, this is a good tester (with a coupon of course):
    https://www.harborfreight.com/digital-automotive-battery-analyzer-66892.html

    But it won't tell you anything useful unless you know the baseline CCA of the battery in the JNC, which I do not.
     
  7. That Guy Gary

    That Guy Gary LawnSite Gold Member
    Messages: 3,942

    rlitman likes this.
  8. rlitman

    rlitman LawnSite Silver Member
    Messages: 2,426

    Just an FYI, I've dealt with Battery Sharks and Sigmas Tek in particular. You get what you pay for. I got a great deal on 80 batteries from them, but never have I had so many replaced in such a short period of time.
     
    That Guy Gary likes this.
  9. That Guy Gary

    That Guy Gary LawnSite Gold Member
    Messages: 3,942

    Good point. When I bought my Kawa bike I checked the price on an OEM battery and thought they were nuts, $130 for a dinky little 14ah battery?

    2 years later, 2 winters without being on a tender or any proper maintenance and it's still working great. I'm so used to replacing cheaper batteries on quads and bikes as often as I change the oil I'm impressed.
     

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