Level autonomy, the lamp takes about two hours at maximum power. About right, I think.
Side finish, however, is bad enough: the seal seems correct, but the plastic loop for attaching the strap bag battery door is torn after two weeks (fixation on the bike frame)! In addition, the plastic member (by which the power cable out), fixed under the lamp, is poorly tightened. Result: the lamp moves slightly during the cycling trips and the lighting is sometimes diverted. Furthermore, I still have not found a way to access the screws connecting this element to the lamp.
For now, the elastic for fixing the lamp to the handlebars holds up, but the two sizes (good idea, by the way) are either too large or too small to fit a handlebar "standard" : it lacks an intermediate size! Result: I fear that the small rubber band (which I use) loose a few outings ... For now, fingers crossed!
Conclusion: good lighting performance, poor finish.
