If you had to choose between JUMPR and another portable external battery, then you should choose JUMPR all the way. Aside from providing some back-up power to your mobile devices when you need it the most, the JUMPR is even powerful enough to jump start your car! So put away those cables for a moment and forget calling a friend for help; with the JUMPR in your dash, your car will be up and running in no time.
Automobiles and motorycles run on 12 Volts. The JUMPR provides 12 Volts of power at peak 300 Amps to ensure that your dead automobile or motorycle battery can be brought back to life. 300 Amps is enough to jumpstart almost all 4-Cylinder and 6-Cylinder engines as well as possibly enough to jump start more depending on type of model.