powering mobile phones from fewer cells focuses attention on every aspect of battery discharge
http://www.edn.com/archives/1997/041097/08df_04.htm
http://www.powerstream.com/Size.htm
http://support.radioshack.com//support_tutorials/batteries/batfaq-1.htm
thermal characteristics of regulators depend on their operating conditions and the system load
http://www.edn.com/archives/1995/102695/22df5.htm
http://www.integritynet.com.au/~purdic/power1.html
Look beyond data sheets and examine your hardware design and software environment to ensure optimal performance and power consumption.
http://www.edn.com/article/CA196478.html
a practical improvement guide
http://www.e-insite.net/ednmag/archives/1997/030397/05DF_06.htm
http://www.steve-w.dircon.co.uk/fleadh/mphil/history.htm