Sorento 3.3L v6 gasoline, stood for a month in the cold. The battery sat down completely, nothing lit up, I did not test it with a voltmeter, but definitely significantly less than 10V. Connected this thing (fully charged) - nothing happened. Nothing turned on, the indicators did not light up, I was even upset. But then, in the darkness, I accidentally found a tiny hidden button on the side of the terminal wire insertion case, then, as it turned out, "BOOST". After pressing everything instantly