More info:1. The cars must be switched off with the ignition off
2. The discharged battery must not be frozen, check that both batteries have the same voltage, usually 12 volts
3. Connect the positive cable, first to the positive terminal of the battery in the assisting car and then to the positive terminal of the battery in the car that does not start
Connect the negative cable, first to the negative terminal of the battery in the auxiliary car and then to a ground point in the car that does not start (- point is present on all modern batteries today)
5. Start the auxiliary car and let the battery charge for a few minutes at an idle speed of about 1500 rpm
6. Switch off the auxiliary car and disconnect the jump leads in reverse order
7. Try to start the car that does not start, otherwise repeat the charge again