Phone pinout could be found on www.cpkb.org.

Gnokii provides tools and a user space driver for use with mobile phones under various operating systems.

Nokia battery hack
http://shaddack.twibright.com/projects/hw_nokiabat/

BSI resistor values
http://www.cpkb.org/wiki/BSI

Nokia 5220 avec battery BL-5CT : R=82kΩ

Nokia F-Bus Protocol
http://www.embedtronics.com/nokia/fbus.html

Nokia Fbus Version 01
http://www.absentdream.com/index.php/projects/electronics/9-nokia-fbus-version-01

Connecting Microcontrollers to Nokia 3310
http://www.mytutorialcafe.com/Microcontroller%20Project%20Thesis%20Nokia.htm

Autres pages Nokia: nokia_6700, nokia_c5