Hello! I have Sony MDR-RF800R wireless stereo hea...

You can get it from Microsoft

Sony Website
Choose your model number
Click "support"

https://www.sony.ca/en/electronics/support/wireless-headphones-bluetooth-headphones/mdr-zx770bn/manuals

Sony eSupport Electronics Purchase Replacement Parts Accessories You can find what you need here.

Probably a bit late for the original poster, but just in case anyone else comes across this....

I also have the Sony MDR-RF4000K wireless headphones and the problem with the sound cutting out has got steadily worse over time, to the point where I felt like throwing them away. I replaced the batteries (use normal rechargeable AAs with a bit of card to trip the little switch that would normally be tripped by the Sony battery pack), however that had no effect on the problem.

After a little research I have established that the power on the headphones themselves is triggered by a pull switch in the right ear cup. When you put the headphones on, the padded headband is stretched and pulls the switch up, turning the headphones on. The headphones have always been a little big on me, and I can imagine that the headband has stretched permanently in the last few years, probably leading to the switch on being more marginal.

At any rate, although I don't have a fix, I now know that if the sound cuts out, I don't need to take the headphones off - just pull the headband up slightly on the right-hand side, or push the headphones as a whole down a bit, again on the right-hand side.

Check for dirty contacts on the charger base.
murf427

Hi,
You can use MDR-RF925R with any thing that has Line Out RCA jacks and your tv should have TV Audio Out RCA jacks to connect this wireless headphone.
Thanks.

nither the light works nor i can charge the headphones :(

You could try to use a player with a stereo balance and adjust that, but in reality you need new headphones. Sonys have very comfortable and flexible cabling but the downside is that they wear out easily.

no sound from tv

Try asking here:https://servicesales.sel.sony.com/ecom/accessories/web/welcome.jsp