Method and apparatus for detecting the condition of a vehicle

Battery protection system for a battery (12) of a vehicle, comprising: a) a switching mechanism (14) which is arranged between the positive terminal of a battery (12) and an electrical load (16), b) a controller (18, 26) for actuating the switching mechanism (14) between an open position and a closed position, said closed position interconnects the electrical load (16) to the battery (12) and the open position, the electrical load ( 16) (from the battery 12) separates c) a battery state detection system (30, 32, 36, 26), wherein the battery state detection system (30, 32, 36, 26) the controller (18, 26) instructs to open the switching mechanism (14) when the battery state detection system (30, 32 , 26) 36 detects a battery state of charge is lower than a threshold value, and d) a vehicle condition detection system (22, 24,26; 60), said vehicle state detection system (22, 24, 26; 60) the controller (18, 26) instructs the switching mechanism (14) to close when (from the vehicle state detection system 22 24, 26; 60), a vehicle start condition or ...