With one half of the Ear (1) fully disassembled, we're keen to finally check out the button cell ...

... and we're stopped by two cables clenching the cell tight in their soldered embrace.

We leave the battery alone for a moment and remove its plastic brace instead. Embedded within we find the main magnet, which holds the headphone in its charging position inside the case.

With nothing left in the opaque white head portion, we'll proceed into the fancy-looking see-through part with the board in it.

Expecting the worst, we're surprised to lever open the stem rather quickly. A little bit of heat and prying with an opening tool grants access to the remaining components.