The power bank is a power source of the mobile phones, and the car jump starter is for jump starting the vehicles while the battery is not work.

So its main function is: either the car battery is drained, or the battery is frozen when the weather is very cold in winter, we can not start the engine successfully, the car jump starter could be used to help starting the car. And we'll never worry the battery problem even if we are far from urban and rescue.

In addition to the jump start function, usually combined the functions of power bank (use to recharge the mobile phones), outdoor lighting and other functions, all those let the jump starters are more essential for outdoor travel.