Yes, old time cd walkmans do work on batteries. Either regular disposable, removable rechargeable, or built in rechargeable. They are usually of the size AA, but can be AAA or a non-standard size.
Cd-R or Cd-RW
CD players and walkmans
In the 70s or 80s they had the walk man which was basically a portable CD player with head phones. Then they had the MP3 and the zune which are still popular today. Then they had a thing where you could put music on your cell phone.
Most operate on batteries although some are powered by solar power.
Portable audio CD players have evolved in many ways. In fact, they evolved from bulky cassette players to walkmans (portable CD players) to what is most common now, Mp3 players that do not require a CD.
Sony still make CD Walkmans, and they can play MP3 CDs. They're very cheap and an excellent value.
The Sony Walkmans come with a two-year warranty, but the player should last much longer.
Batteries
???????????????????? What exactly is your question? If you are asking if Ni-Cd batteries are rechargeable, then the answer is yes, although you need be sure to have the appropriate charger for them, just as with NiMH batteries.
Yes there are several portable devices out there that play both the radio and CD's. They are called walkmans and you can find them at your local Radio Shack, Best Buy, or at www.ebay.com or www.amazon.com
no
change the batteries