Hi. The RioS50 mp3 player was on the market some ten years ago. The owner's manual and reviews are easily found online. I got one at a yard sale for not much money a few years back. It lacked the charger and the cable that allows one to download songs from a computer. "That's why it's so cheap," the seller said.

Almost incredibly, I found the cable at a thrift store. iTunes recognizes the device, and it works with Rio's software as well. Storage is limited, but it has an FM radio. It still works, and I still use it.

It was designed to run off a 1600 mAh NiMH cell. It can run off an alkaline cell or a NiCd cell too. Because I do not have the charger, I have to remove any rechargeable cell for recharging. Although the owner's manual and reviews are online, I have not found the details for the recharger. What was its output voltage? How much current did it supply? What was the size of the barrel connector? What was the polarity of the tip and the ring?

If anyone can come up with that information, I would be grateful. The charger probably worked with other Rio players that ran off a single 1.25 volt or 1.50 volt cell.

Thank you.

On Friday, November 15, 2013 12:30:52 PM UTC-5, Beloved Leader wrote:
Hi. The RioS50 mp3 player was on the market some ten years ago. The owner's manual and reviews are easily found online.
.....

Although the owner's manual and reviews are online, I have not found the details for the recharger.

I just wasn't looking hard enough. The correct voltage is revealed he

http://transistor-man.com/Altoid%20MP3.html

"The power source was 1 AA / AA NIMH battery, which was dc-dc converted to 3.3V for the devices operation."

So that's the trick. I don't think it's a new page, but I've never seen it come up before in a search.