An automatic safety switch provides an automotive battery with protection against accidental discharge due to operator neglect. Such operator neglect includes inadvertent use of electrical circuits such as headlights, parking lights, or interior lights subsequently to turning the ignition...http://www.google.es/patents/US5691619?utm_source=gb-gplus-sharePatente US5691619 - Automatic safety switch for preventing accidental battery discharge
Automatic safety switch for preventing accidental battery discharge
