I have an early Dewalt radio/charger. It has AM/FM and an aux input. I also have an old Sony CD Walkman that I plug into the Aux. Works great, sounds fine. Only thing is I have no more Dewalt tools so once the battery in the radio stops taking a charge, I may have to buy a new one.
When tools used Ni Cad batteries, the radio was the best for cycling the battery all the way down to zero charge for a full recharge. My batteries used to last way longer than my friend's.