I’m not going to do this to mine but will one of you please try this: take the battery out, drill a hole right through the middle, then weave a non metal line through the hole and AROUND the battery as installed. Could look cool!
The shell is actually the speaker diaphragm. And the speaker neodymium magnet is dead center attached to the back of the battery compartment. Putting a hole in it would likely affect the audio performance.
If someone does it like to know what actually happens.