• ETC
  • Apr 28, 2014
Since we carry and deal with more and more items that need batteries, we have to figure out better and mobile ways of charging those batteries - at least until John Galt arrives and shows us how to harness electricity from the air. In the meantime, the Jumpr from Juno Power is one of those chargers trying to make our lives easier by being able to both charge your small portable electronic devices as well as your car battery.

There's a 6,000 mAh battery in that sky blue case, which Juno Power says is also good for a 12-volt boost at 300 amps. The company says it's robust enough "to jumpstart almost all four-cylinder and six-cylinder engines," but in case you're wondering how 300 amps can run safely through those tender cables in the image above, it's possible that Juno Power is playing casual with the meaning of "jumpstart;" elsewhere on the product page we're told that the Jumpr " is capable of jumping a completely dead car battery in minutes." So it sounds like this is less of a jump for your car and more of a series of quick, restorative hops of electricity - or, in other words, something we call "charging."

There are other devices that do the same thing (like this and this, two more expensive options) or you can get two specific tools for each job (like this and this, which together cost the same as the Jumpr). Not that it matters - you won't care to argue semantics or originality if the Jumpr can keep you from being stranded outside that Swedish death metal concert at 2:00 AM. It goes on sale on May 1 and costs $69.99.


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    • 1 Second Ago
  • 18 Comments
      Gettin Randy
      • 8 Months Ago
      I have to admit, if this thing works any where near as well as it claims, I'll buy one for each of my cars. My only questions is, how long does it hold a charge in between uses? I couldn't seem to find that information. I'd say that would be big factor in how useful it is.
        Hunter Ho
        • 7 Months Ago
        @Gettin Randy
        It can hold charge for 6 months. But we recommend charge it every 3 months.
      Patrick Floyd
      • 8 Months Ago
      That’s such a cool idea! But am I supposed to believe that that tiny phone battery can jumpstart my car when the battery is dead? I think this idea is crazy, cool but crazy. I don’t think that they will be able to pull 12 volts out of that small battery. With the amount of other cars on the road one car is bound to help you out and give you a jump so why is this needed? Also at $70 why buy that small battery that maybe could help you out when you could purchase a backup battery for just a little bit more? To me it seems unnecessary but a very cool idea.
        usmckozmo
        • 8 Months Ago
        @Patrick Floyd
        Pulling 12V out of that little guy is *easy* : They just stack the internal cells in series to compound the voltage. Assuming they use a 3V Lithium cell, 3V x 4 cells in series = 12V output. The issue I see is the lack of Amps to properly recharge a car battery, or jump a full sized internal combustion engine. Generously assuming they are 3600mA cells (still wired in series!), the Amps don't stack like they would in a parallel circuit, so you would be pushing 3.6 Amps, next to a dead car battery that normally pushes 800 Amps to crank the engine.
        Hunter Ho
        • 8 Months Ago
        @Patrick Floyd
        It is true. Check this out http://youtu.be/yQKK1mcavEA
      yashtanwar25
      • 4 Months Ago

      I watch all this on youtube its amazing to saw how phone battery starts a car hope it will works and nice info.

      BipDBo
      • 8 Months Ago
      "So it sounds like this is less of a jump for your car and more of a series of quick, restorative hops of electricity - or, in other words, something we call "charging." Bro, are you an auto journalist who has never jumpstarted a dead battery? Anyone who has ever jumped a car when a battery is completely dead knows that it takes a few minutes. You can't just jump a completely dead battery the instant you hook it up because there is too much resistance in the standard cables. You connect the two cars and start the jumper car and let it run. Some like to rev the engine. The alternator in the jumper charges the dead battery to the point that the electrons from the now partially charged battery, plus the electrons coming through the cables is enough to turn the engine over.
        Krazeecain
        • 8 Months Ago
        @BipDBo
        If you have a solid connection and good cables, you can easily jumpstart a car immediately after hooking it up. I do it all the time, even on completely dead batteries.
        Hunter Ho
        • 7 Months Ago
        @BipDBo
        I agree with you.It takes a few minutes waiting before starting a car with jumper cables. But if you jump start a car with this tiny jump starter, you don't need any assistance from the car battery
      jz78817
      • 8 Months Ago
      Who is John Galt?
      Jonathan
      • 8 Months Ago
      Ok, this is actually something cool.
      nonosh
      • 8 Months Ago
      Swedish death metal? Are you an Opeth fan?
      Brent Worrell
      • 8 Months Ago
      Snap-on and Matco are selling something similar (probably the same goddamn thing who knows) anyhoo it does work and its great to keep in your glove box or trunk for a jumpstart in a pinch. also much neater then jumper cables. I borrowed one from a tech at work friday to jumpstart a TDI Jetta and its quite powerful for something so compact.
      Robert Harrold
      • 8 Months Ago
      That blue EC3 connector should never be used for anything with that high of amperage. You can desolder the connector in a matter of minutes at 75 amps.
        Hunter Ho
        • 7 Months Ago
        @Robert Harrold
        This little thing can generates maximum current up to 400 amps. After 15 times of jump start, the temperature of the box surface is about 50 celsius. And I don't smell anything burning. I'm not technician, can you explain?
      GR
      • 8 Months Ago
      Or for the same price, you can get an actual jump starter from Costco that will jump just about any car without charging the dead battery first for a couple of minutes. You can just keep it in your trunk for emergencies or camping use too.
      Nicolas Hoyt
      • 8 Months Ago
      I actually have the Allstart version of this. I can start my Jeep with the battery completely unhooked and it acts just like the normal battery.
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