Your player contains an internal battery and it is recommended to dispose of your player according to your local recycling options for batteries. Many retailers will accept your Philips MP3 players for reuse and recycling and some will provide a store credit for certain models. In addition, many US Post Offices have free plastic mailers to recycle small electronics including MP3 players. Please click here for further information:
http://www.recycle.philips.com/mp3.html