Patent ID: 8032259

Claim:
An electrical circuit for bi-directional power control between two devices, comprising: a first battery-operated device, comprising: a first battery operative to provide a source of power to the first device; a first power management subsystem connected to said first battery, operative to power on components of the first device in response to occurrence of an event to wake up the first device; and a first on/off button operative to generate an event to wake up the first device; a second battery-operated device, comprising: a second battery operative to provide a source of power to the second device; a second power management subsystem connected to said second battery, operative to power on components of the second device in response to occurrence of an event to wake up the second device; a second on/off button operative to generate an event to wake up the second device; and a switch operative to automatically generate an event to wake up the first device, in response to said second on/off button generating an event to wake up the second device; and circuitry comprising a single connection line inter-connecting said first power management subsystem, said first on/off button, said second power management subsystem, said second on/off button, and said switch.