Watch the PIXA range video : http://youtu.be/JPVjS-Hzo2s
Compact and rechargeable, the PIXA 3R is the hands-free lighting solution designed for frequent, demanding use. The integrated rechargeable battery offers an advantage over batteries: more practical, economical and environmentally sound. The PIXA 3R can also be configured to prioritize either lighting power or battery life.
More info on : http://www.petzl.com/PIXA3R