Now your smartphone’s backup battery can jump start your car too


Here at The Gadgeteer we have seen and reviewed more than our fair share of portable backup batteries for smartphones and other USB devices. But we’ve never seen a smartphone sized backup battery that can also be used to jump start a car. That’s right, the Junopower JUMPR is a 7 ounce 5.5” x 3” x .6” sized backup battery that can provide 12 Volts of power at peak 300 Amps ensuring that almost all 4-Cylinder and 6-Cylinder engines (possibly some 4.8+ Liter automobiles as well) can be restarted from a dead car battery in minutes. The JUMPR is a 6,000 mAh lithium polymer battery that also features 5V 2.1A USB output for power hungry mobile devices. But wait, there’s more! The JUMPR also has a built-in flashlight. Seems like a very handy device to keep in your gear bag for one of those just-in-case moments.

The JUMPR will retail for $89.99 MSRP; but from now until May 1, 2014 users will be able to pre-order the battery for $69.99 at

4 thoughts on “Now your smartphone’s backup battery can jump start your car too”

  1. @ Gareth

    If it was kept in the car at the said -40, no, Li-ion batteries don’t do well at that temperature. If you bring it from the house, will do just fine.

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