AC Adapter for Charging Sansa Clip w/o Connecting to Computer

Sorry to bring up a slightly older topic but this one had most of the info I wanted to know. However one question I have is this. When using a Motorola phone charger, can I still listen to the music? My company wants to use an MP3 player for it’s on hold music and that would require it to be constantly plugged into a power source so it never dies. Would this be a viable solution?