An anti-theft device that is adapted to be connected adjacent to or on a battery of a motor vehicle and including a power switch for disconnecting the battery from its standard battery cable when current flowing through the cable exceeds a preselected substantial amount of current associated with an...http://www.google.co.uk/patents/US5132551?utm_source=gb-gplus-sharePatent US5132551 - Self-contained anti-theft device for motor vehicles
