Motorola Solutions, Inc.

Viranga L Wijeratne

Donald L Flowers

Frederick J Weissinger

John E Herrmann

Charles William Friedli

Warren B Albert

Bradley E Long

John Alexander Herrmann

Embodiments include a portable rechargeable battery pack, system, and external adapter that allow the portable rechargeable battery pack to both power a host device though a set of host contacts and provide power through a set of charging contacts. The portable rechargeable battery pack includes a charge protection circuit that prevents an excessive discharge current through the charging contacts and allows high charge current when charging the portable rechargeable battery pack. A discharge circuit allows a low level discharge current through the charging contacts to provide power to other devices.

Portable rechargeable battery pack and external adapter for same

A method and apparatus for multiplexing an electrical contact interface between two electrical devices uses a time differentiated enablement of two or more different circuit elements in a first electrical device that are accessed via the multiplexed contact by a second electrical device. A timing control circuit in the first electrical device enables and disables circuit elements in the first electrical device coupled to a shared information contact over time. The second electrical device interacts with a first circuit element during an initial period upon connection to the first electrical device, and then interacts with a second circuit element after the initial period.

Method and apparatus for a multiplexed contact between electrical devices

Growing community of inventors

Duluth, GA, United States of America

Viranga L Wijeratne