The LED driver is the same as for the smaller ring, and so far I'm running
it on 7.4V Lipo packs - but I know that there has been talk about using a
larger pack, maybe 11.1V to get it even brighter.
If you haven't seen the old ring in daylight, watch this video - it's quite
amazing, and this was the old, single ring!

http://www.youtube.com/watch?v=WnKCz...e=channel_page

Tor