US Patent 7586289 Complete discharge device

An apparatus and method for completely discharging a battery by use of a tab that initiates activation of a discharging circuit when the tab is pulled out of the battery case. The tab is operatively coupled with the actuator of a switch which in turn is coupled to a discharging circuit. The tab extends from the battery case and may be covered by a protective cover, or may also be attached to the protective cover. The tab is attached to an actuator of a switch and detaches from the actuator after actuation, thereby indicating actuation and preventing the switch from subsequently being moved. The switch completes the circuit, initiating the discharging process, when a movable contact engages a stationary contact and completes the discharge circuit.