People, hello everyone! winter, -20, the car stood in the cold for 10 days, the voltage on the battery sank (the signaling can show), the car would not start (with the start-stop button), I went to the nearest store bought this device for 6 shtugrins in a well-known network (as I later found out him 4 red price). First, after the store, he came to the car, picked everything up _strictly according to the instructions_ - the car did not start, the thing itself went to zero instantly (1 lamp out of 4). It doesn’t matter, I went home, charged from the outlet for 2-3 hours until fully charged - it didn’t start. The car spent the night with the hood open. I put the brick on charge for the night, it charged right up to 100%, went in the morning, and now, progress - at least she managed to turn the starter several times. the car did not start, the wires at the device melted and fell apart (positive wire, in a place where there are some previous ones under the cambric or whatever). The cambric was charred, the wire was unsoldered. Spat, passed back to the store. Later, I already smoked materiel, the starting current of my battery is more than 600A (engine 2.4 gasoline), this brick has a nominal 200 maximum of 400. Of course, it will not start anything. Although the box says they say up to 3.5 liters in easy. Always check these numbers. And as I understand it, if you want to start a car (especially a diesel engine) in a deliberate way, you need a serious device with a suitcase size, and not such gadgets.