THIS APPEARS to be your BATTERY:
"Sony HBH-DS220 HEADSET battery"$13.15 shipped NEW from eBay:
eBay: 182763761261
*you may find a better price elsewhere*
Battery REPLACEMENT is shown in this YOUTUBE:HBH DS 220 Auseinanderbauen disassembly
It's REALLY out of focus but you should get the idea!
Anthony
Phone: Turn on Bluetooth and Bluetooth visibility. Keep it close to the headset (20 cm).2. Headset: Switch it off. Press and hold down the on/off key until the pairing icon appears on the display.3. Phone: If your phone supports auto pairing, press YES when Add device? appears to complete the procedure. If not, continue with the next step.4. Phone: Follow the applicable User guide to pair with a Bluetooth headset. You may need to enter a headset passcode (0000).
Win7 will automatically download & install the required drivers for your SE HBH-DS220 BT headset. After installation, right click the speaker icon in the taskbar and select Playback Devices.
Set the HBH-DS220 stereo as your Default Device...
The wire to headsets can get damaged (usually not visible from the outside, as the wires inside the covering can be very delicate, to keep the size of the wire down) from throwing them in the pocket, purse, etc. Try a set from a friend to make sure the device is still working itself.