All about batteries & lights... for night mtb

Chemistry:
http://www.chem.hawaii.edu/uham/bat.html
http://www.nordicgroup.us/s78/

The industry:
NightRider
L&M
DanoLight

http://peterwhitecycles.com

Acclaimed home-made lights:
http://joegross.net/2007/08/14/schmidt-hub-dual-cree-xr-e-led-light/

Direct Battery & light sales:
http://www.batteryspace.com/index.asp?PageAction=VIEWCATS&Category=499
http://forums.batteryspace.com/forums/viewtopic.php?t=5251

DIY:
http://joegross.net/2007/08/14/schmidt-hub-dual-cree-xr-e-led-light/
http://www.mtbr.com/files/data/18.html
http://www.instructables.com/id/SZMEGU9F1B3RAV0/
http://www.instructables.com/id/BIKE-LIGHT-500-Lumen-%22Mt.Bike%22-for-under-10-bucks-/
http://www.instructables.com/id/E9TB6BF1X8EXCFHBIC/
http://www.instructables.com/id/SXA8L6XF0FI39ST/
http://www.instructables.com/id/LEDs-for-Beginners/
http://www.instructables.com/id/EIMDD88XB2EV2ZA2LV/
http://www.instructables.com/id/E5971IAKRZEY95SF3M/