With mp3 players sending portable CD players the way of the dodo, and with the proliferation of powered mini-speakers this is a thrift-store build waiting to happen.

Today, every smartphone is a portable media player; however, prior to the smartphone explosion in the 2007-2012 time frame, a variety of handheld players were available to store and play music.

Prior to its introduction, portable CD players were notorious for ... necessity amid the rise of flash-based MP3 players. These newer devices could store entire music libraries in solid-state ...