If you have a guitar pick or fingernails you can take the BH-214 apart, I think I might have a fake and that is what I did, the bezel around the button is just gently lifted/pried until the catches pop loose. THe circuit board is held in by I believe four plastic catches that require a bit of pressure and bending to let release. The battery is held in with double side tape.
I take no responsibility for cracked cases, I have taken apart many small gadgets and know where to look and how these little snap connections feel and how to open them.