I just wanted to say thank you so much for posting this guide. I attempted a repair of this headset yesterday using the EBL battery midoriryu referenced and it went well. I did not remove the PCB or the speaker cup, leaving those delicate wires attached. I did, however have to reverse the polarity of the EBL battery even though the pictures on Amazon showed the correct polarity. It was a bit of a pain, but I got through it. Hopefully this battery will last a bit longer, and if it doesn't, it is not an expensive replacement. Original Battery