900mAh 3.7V Replacement Battery for Sennheise r PXC 550 Wireless Headphones, AHB413645PCT (CAN-553443PCN)

My experience was pretty negative, product just arrived and the cord connecting the battery to the headset is destroyed! Not just in one place but in multiple places on the wires. How does this happen?!? Quality assurance guys, it's GOOD for your business...

I rarely if ever write a product review, but thought it was necessary as there's a lot of misinformation. I replaced my original battery for my Sennheiser PXC-550 with this battery. Yes, you can replace it yourself. Also, I waited a bit to write this review to make sure the battery went through a couple of recharging cycles.This battery works as good as the original it replaced when new. Now, much like when I first got my headphones, they run for days without having to recharge them. If anything changes in the coming weeks/months, I will revise my review. But, for now, I am delighted that my PXC-550s work flawlessly.

Dead as a doornail on delivery. Actually this battery is worse than the one it was replacing....at least that one would charge to 40%. Do not buy from this company. My first experience with them and that's all I need. Problem today is more and more you find these companies ripping folks off using Amazon to do it. Over the past year I have seen it more frequently. If Amazon doesn't get this under control, they'll lose customers, like this company just did.

So far this battery pack is working perfectly on my PXC 550s. Remember, the battery is located in the headphone that does NOT have the charging port. Also be careful with the wiring inside the headphone. They are really thin. Don't bend.