Hope Vision 1
Takes 4 AA batteries in a pack. So you can carry spares if they run out. (they are held in a case which you can just pop into the light)
A set of rechargeable AA's lasts me the weeks commute.
Uber reliable light made by a decent British company who's customer service is second to none.
+1
And I'd buy one quick.
It's surely going to be discontinued, as:
@ It's very good.
@ It's very keenly priced for what it is
@ Its design is resolutely unfashionabe
@ It doesn't have built in batteries, so it will most likely last forever, or as long as you need it/cycle
@ It's got a lot of metal in it
@ You can't fit it up your anus - unless you are somewhat determined/into that sort of thing
@ It comes in different colours
@ It uses "normal" standard batteries that will doubtless get better/cheaper as you keep the light
@ It won't end up as land fill
@ It reminds folk of good solid British stuff that was actually quite good - telephone boxes/post boxes - none of that tin crap
@ You will be spared the social angst of having to impress folk next year/the year after that/and that with your new light.
mind you, the clamping/bike swapping system could be improved
