My B&M Lumotec Cyo dynamo light seems to be almost always on when in "sensor" mode - also when it's not really dark around. Could it happen that the light sensor opening got soiled? Sounds dumb, ...
Did anyone take apart the replaceable battery of the Expilion headlight? I assume it contains a 18650 like battery, but some have a protection circuit built in and some not. Any knowledge about the ...