05864766 is referenced by 60 patents and cites 8 patents.

A cellular telephone battery having the functions of auto answering, hand-free listening and speaking, low power control, power wake up control, battery protection, and quick charging. The battery includes an auto-answer and hand-free control unit connected to the mainframe of the cellular telephone, a set of control buttons, a microphone, an indicator light, and a speaker respectively mounted on the outside for operation by the user to control the auto-answer and hand-free control unit, the auto-answer and hand-free control unit including an encoder/decoder/storage unit and two exchanging units controlled by the control buttons to achieve the specified functions.

Title
Cellular telephone battery with auto-answering and hand-free functions
Application Number
8/689685
Publication Number
5864766
Application Date
August 13, 1996
Publication Date
January 26, 1999
Inventor
Chih Cheng Chiang
No. 162, Ta-Yu Str., Hsi-Tun Dist., Taichung
TW
Agent
Bacon & Thomas PLLC
IPC
H04M 1/00
H04B 1/38
View Original Source