In reply to The Ice Doctor:
I got 1 the other day of ekosport.com for £36. I've only been for a couple of runs using it but seems pretty good. Nice and small and light.
Some one mentioned modified batteries. It's a little piece of the battery label removed , you can do this to any rechargeable battery.
I also have a petzl xp2. Very similar brightness but better battery life. BuT doesn't have the light diffuser/ flood light feature like the petzl does.
*I mean the bd has better battery life
Post edited at 09:34