Starting Batteries and Deep-Cycle Batteries
http://www.batterycouncil.org/batteries.html
basic structures of power supplies
http://home.eunet.cz/rysanek/sup_en.html
http://www.ce-mag.com/archive/2000/janfeb/armstrong.html
http://www.edn.com/archives/1997/081597/17cs.htm
some tips and recommendations
http://www.edn.com/archives/1995/101295/21df3.htm
http://www.wvic.com/how-gen-works.htm
http://www.e-insite.net/ednmag/archives/1994/060994/12df4.htm