The left outer chrome cap that has B&O etched on it is the battery cover. Just rotate it counter clockwise and it will come off and allow you access to the battery. You do not have to disassemble the entire ear cup as shown in the video.
@@TamNgo84 I tried to open it from the outside, but it wouldn't work, so I had to screw it in to open it. Now I can take out the battery, thank you very much.
