Motorola Corporation

Lawrence M Green

Harold L Wikel

David P Townsend

Richard Lee Hammon

Adapter for a communication device

A method eliminates the discharge of the backup battery (,) prior to the primary source of power initially being applied to the device. The method comprises detecting the application of a source of primary power (,) and providing a path by way of a switch (,) in response to receiving the power (,), wherein the path allows the backup battery to power the device. Also, a circuit for maintaining the charge in a backup battery (,) of a device before primary power is applied comprises a sensing circuit (,) for generating an activation signal after initially sensing the application of the primary power to the device, and a switch element (,) coupled the sensing circuit (,) to receive the activation signal. The switch element (,) provides a path for the backup battery (,) to power the device. Accordingly, the method and circuit allow manufacturers of devices incorporating a backup battery (,) to install the backup battery (,) prior to shipping and eliminate the requirement for the purchaser of the device to install the backup battery (,).

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Lindenhurst, IL, United States of America

Lawrence M Green