Abstract: Communication device keypad illumination. A mobile communication device can include a housing and a mobile communication device numeric keypad coupled to the housing, the mobile communication device numeric keypad having an external visible portion. The mobile communication device can also include a light source coupled to the housing, the light source dedicated to direct light substantially at the external visible portion of the mobile communication device numeric keypad to illuminate the mobile communication device numeric keypad.

Abstract: A mobile communication device having a light accessory port. The mobile communication device can include a housing, a transceiver, a controller coupled to the transceiver, a light generating source coupled to the controller, and an optical transmission port coupled to the light generating source and coupled to the housing. The optical transmission port can be configured to optically and detachably couple a visibly perceptible light-emitting light output device to the mobile communication device.

Abstract: A modular housing system (100) comprises a first housing unit (102), a second housing unit (104), and a clamp (600). The first housing unit (102) has a first bottom wall (610) and a first side wall (108). The second housing unit (104) has a second bottom wall (612) and a second side wall (116). The first housing unit (102) defines a first channel (702) which borders the first side wall (108) and includes an first opening (703) along the first bottom wall (610). The second housing unit (104) defines a second channel which borders the second side wall (116) and includes a second opening along the second bottom wall (612). The clamp (600) has a longitudinally extending U-shape defining a base (800), a first attachment wall (802), and a second attachment wall (804). For optionally attaching the first and second housing units (102, 104), the first attachment wall (802) insertably attaches within the first channel (702) and the second attachment wall (804) insertably attaches within the second channel.

Abstract: An apparatus (100) for an electronic system (106), which includes a portable unit (102) and a base unit (104), supplies backup power to the base unit (104) and is capable of recharging at least one battery (121) that operates the portable unit (102). The apparatus (100) is connected in series between the base unit (104) and a main power supply (148) and includes at least one slot (131) configured to receive the at least one battery (121). When power from the main power supply (148) is available, the apparatus (100) supplies power to the base unit (104) from the main power supply (148) and is capable of recharging the at least one battery (121). When power is not available from the main power supply (148) and the at least one battery (121) is received within the at least one slot (131), the apparatus (100) supplies power to the base unit (104) from the at least one battery (121).