All the headlights that came with it didn't work. I have tried batteries that I know are fresh/charged and also changed the orientation of the batteries. There are no instructions or markings to orient the batteries. The cones themselves are fine. I'm a drone photographer. After one of my drones was "broken", I decided to buy it. As the saying goes, "20/20 retrospective". You should start rolling them from the bottom up instead of the top down. Aside from the light not working, they are comfortable and fit.
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