Hello, my son’s car has been starting for 2 days (Jazz 1.4 – EZ 03/2008) It sounds like the battery is empty, as soon as the USB start-up device is connected, it works and the car is running. Battery contacts are fixed and no wobble contact. Charging current is OK if the car is running (have pretty primitive testers to connect to cigarette lighters) The car was standing in front of the house the last weeks, someone has a help for me what it might be about? How can I find out without further test devices whether the battery is over, is it possible after such a short time? Thanks for any tip