fish1050
Headphoneus Supremus
You can self-service your battery I bet i have seen sony glue is not strong, so you can peel the elather and then use some UHU Glue to reglue (no, just don't use super glue!)
I´peeled the back of my then X1060, so i assume same applies for zx series and the new signature sound walkmen
To add to that, all Sony DAP's made after 2013 do not have user replaceable batteries anymore. It was costing Sony to much in lost sales.