One of my best purchases, saved a lot of nerves. I start the diesel 2.0 liter Ford Mondeo, it feels like starting with a perfectly charged battery. It is important to have very good contact at the terminals. At the first attempt, I hooked it onto a rusty mass - it didn’t start, it just sparked. Cleaned up with a file, now everything is fine. From the tips - first we hook the crocodiles, then we connect the device. We take only the device itself into the heat, the cover with crocodiles and everything else can be left in the cold in the car.