A portable radio communication device (102) includes a housing (302), and a transmitter (906) and control circuitry (902) disposed in the housing (302). The housing (302) is configured to carry a first battery source (112) and to optionally simultaneously carry a second battery source (114). The control...http://www.google.fr/patents/US5999832?utm_source=gb-gplus-shareBrevet US5999832 - Method of and apparatus for controlling a transmit power of a communication device
Method of and apparatus for controlling a transmit power of a communication ...
