This launcher was given to me. For the time being, I used its secondary functions: to recharge the phone, to power the laptop. It provides for the termination of power supply at 100% charge of the gadget, which saves its battery. Also, if you have to climb under the hood in the evening, the flashlight in the launcher is convenient, bright, not sharp in color. And then one day it was time to start the car with it. The battery lasts for 2 starts at positive temperatures. How much is enough in the cold? The device is undoubtedly useful in emergencies.