Abstract: The device includes a power-supply block for the electronics making up the device, and a block for detection of an incident undergone by the vehicle; it further comprises a block for processing the signal from the block for detecting an incident, and activation block for disconnecting the battery in the event of such an incident, a block to indicate the status of the device, and a block for resetting the device. Disconnection of the battery is achieved in situations such as fire, short circuit, collision or when any other signal is received from the exterior.