As it measures 95 X 15 mm, it is still in the pocket of my jacket.
Walk with one AAA battery stick (R3?), You can find anywhere.
The brightness gain is really impressive compared to the old model purchased 6 years ago.
Bright enough to allow me to borrow a country road at night.
I have not measured the self but I think it is at least 20 hours.
In wide-angle mode, disk homogeneous and uniform light, circled with blue.
In focused mode, the light is yellowish.
One remark: the width of the beam control system weakens the lamp by adding a movable part.