During the winter, for its intended purpose, it came in handy 4 times. In a particularly severe frost, and even after the weekend (the car did not start for more than a day), the booster did not help. Only wires from the neighbor's car. I mainly use it as a power bank during business trips. Tablet, mobile phones, ashka . In general, it does not lie in vain. Different pros: Compact. There is a cover. A bunch of goodies. A flashlight (I used it) Wires for launching from a decent silicone. Its cons: It was necessary to take more help. It was not always possible to spin a diesel engine on it.