Perhaps I am missing something but I don’t see anything that describes the kinder way to open. I have an old series streamer that mother in law uses to read audio books and its getting to the point that the charge doesn’t last. I’d love to get it open and replace the battery
Is it the Streamer Pro, like the one on the right in sombodynobody02’s picture?
If so, the back can be gently pried off with a small knife blade or similar. There is a small recess in the back at the bottom, just under the Oticon name. That’s where you start.
Once you get the back off, you will see 5 very small torx screws. There is a sixth screw hiding under a small silver strip that has the serial number and a bar code. Just gently peel up that tape. Once you get those screws out, it’s pretty simple to disassemble it far enough to get the battery out.