Patent ID: 7415291

Claim:
A battery assembly system for a cellular telephone, comprising: a first battery for providing power to the cellular telephone and having terminals for establishing an electrical connection with the cellular telephone; a first sound generating device attached to the first battery and comprising memory for storing a first sound file, wherein the first sound generating device is triggered to play sound associated with the first sound file when the first battery is installed in the cellular telephone upon receiving an electrical signal produced by the cellular telephone through the terminals upon detection of a telephone call by the cellular telephone and to play sound associated with the first sound file upon detection of a signal from the cellular telephone to the first battery generated by an event at the cellular telephone other than an incoming telephone call; a second battery for providing power to the cellular telephone and having terminals for establishing an electrical connection with the cellular telephone; and a second sound generating device attached to the second battery and comprising memory for storing a second sound file different from the first sound file, wherein the second sound generating device is triggered to play sound associated with the second sound file when the second battery is installed in the cellular telephone upon receiving an electrical signal produced by the cellular telephone through the terminals upon detection of the telephone call by the cellular telephone and to play sound associated with the second sound file upon detection a signal from the cellular telephone to the first battery generated by of an event at the cellular telephone other than an incoming telephone call.