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5 Tips for a Long Jump Starter Life

In the world of jump starting, there are several steps that, if adhered to, will keep your jump starter in good operating condition and support a long service life. Keeping these tips in mind could significantly extend the life of your jump starter.


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  1. Just read your newsletter. Enjoy getting these and the reminder to charge my JNC300XL, but just read something that alerted me to an issue I may be causing.

    One of our concerns in Arizona, is coming out to our car in the heat (110’s) and having a dead battery. I’ve kept my jump starter in the garage which can get pretty hot in the summer.

    After having my battery die at work and getting a jump start from security, I thought it best to have it on hand in case someone in my family needed help. So it’s in the car and it can get very hot in there. So I’m not able to figure out where to keep it after reading that it should be stored between 50 and 70 degrees.

    So what does one do? I don’t know where 50-70 degrees F is a realistic temperature, not even in our home. I’d like to live there!

    So, am I destined to now have a dead battery and dead jump starter when I need it?

    • Clore Automotive says:


      Please understand that the 50-70˚F is an ideal. Some of our research indicates that storage temperatures up to nearly 80˚F are beneficial, so if your indoor temps are anywhere near there, that would be good. The battery in your JNC300XL is a very good battery and will tolerate the heat much better than most. The unit should still serve you well, but may not last as long as if it were used in a more moderate temperature, where it wasn’t stressed as much.

      I would suggest a few things:

      – I would probably bring it inside to charge every month in periods of high heat, rather than our normally recommended interval of every 90 days. I would suggest not charging the unit until it has cooled down a bit after being brought inside. For instance, if you brought it inside at 7 p.m., perhaps not put it on the charger until 9 p.m. or so.
      – I would recommend bringing it inside every once in a while if you know you aren’t going to be doing any driving that day, just to give it a break.

      I think that your unit will be just fine, but taking the above two steps will help you get a longer life from the unit.

      Please let me know if I can be of further help.

      Thank you,

      Jim O’Hara
      Clore Automotive

  2. Ron Flowers says:

    Ditto what “Alan” stated above, but my issue is the Cold Weather here in NJ. I have been leaving it in the ’03 Xterra, something is draining the car battery. Car battery was just replaced, I never know when the Truck will be dead. I’m thinking it is a worn ignition switch, a mechanic stated it is made of plastic & wears out??? So I’ve been making sure the Steering Wheel Column is in the “locked” position before getting out (not sure if that’s the answer).
    Having the unit in my vehicle has saved now a few times, so I guess I’ll just keep it out in the cold. Not much good if you don’t have it w/ you when you need it. So what, charge it weekly?

    • Ron – We understand your concern and your need to keep it in your vehicle. 70˚F is the ideal storage temperature for a battery, so we provide this as a reference point. We know that, in the real world, it is seldom 70˚F. Our units are designed to be stored and used in all temperatures. What we suggest is, if you store the unit in your car, during the winter (in cold temps) or summer (in very hot temps), bring it in once per month and charge it at normal room temps, rather than the normally recommended 90 day interval. Also, if you know you are going to have an extremely cold spell (-15˚F, etc.), it wouldn’t hurt to bring it in overnight. That extreme cold won’t hurt the unit, but it will reduce its power, just like you car battery. I hope this helps. Jim from Clore Automotive

  3. Hi. What is the estimated service life of a Clore Jump Starter? Mine is 7 – 8 years old and gets minimal to infrequent use. Should I replace the unit? Thank You, Paul Molnar

    • Paul – It really varies. 7-8 years is quite good, though you unit may still be fine. If you have a battery load tester, we suggest placing a 100A load on the clamps for 10 seconds. If the unit can maintain its voltage about 9.5V at the end of the ten seconds, it still has capacity and should be fine for future use. If the tester show low voltage (or no voltage) at the end of 10 seconds, the unit has lost its capacity and should be replaced. If you don’t have a load tester, you may be able to borrow one at an auto parts store. I hope this helps. Thanks, Jim from Clore Automotive

  4. george booth says:

    Y’all should add Bluetooth to your chargers so we can see if the battery jumper needs charging the technology is available!

    Heck, it should be smart enough to message us that it needs changing.

    I’d buy a new one immediately, if it did.

    • George – Thanks for your comment. Great idea. We are working to bring smart features to our products and we’ll make sure this idea is under consideration. Thanks again, Jim from Clore Automotive

  5. Kevin Nichols says:

    What is the ball park range of charging my JNC300XL I also get your reminder to charge it so I usually charge it 8 hours is that enough ?

    • Kevin – 8 hours should be sufficient in most cases. Always check you status lights at the end of the charge to be sure you are fully charged. If you deeply discharge the unit after use as a portable power device, it could require an overnight charge to get back to 100%. Thanks, Jim from Clore Automotive

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