𝟮𝟬𝟮𝟱 𝗡𝗲𝘄 𝗨𝗽𝗴𝗿𝗮𝗱𝗲𝘀 Z55H Battery,Replacement Battery for WF-1000XM4 • Truly Wireless Earbud Headphones Battery+ Tools [2PCS]

So far, works well and install was easy.

This kit saved me couple hundred bucks by not buying a new earbuds! The kit included everything you need. You might need a heat gun. I already have a cheap heat gun and used that to split the earbuds open (you probably don't need one but it makes the disassembly a lot easier). It seems like this kit has a little higher battery capacity than the original and better voltage rating too. Very happy overall.

I'm not that good at small electronic repairs and it still worked! Used these to solve issue in sony earbuds. Saved $300 easy by changing these batteries. So thankful for google and how to videos. These batteries are legit. Don't be scared of them

Was super excited about replacing the batteries in my wireless earbuds. YouTube videos made it super easy. Use the hair dryer to loosen the glue to open up the earbuds. They've been working great and I've been using them for about a month. Batteries are awesome. So great you can fix this yourself.

Follow the video instructions carefully. There is no link to the video in the package but a quick search on Google finds the video. My earbuds charge to 100% now. Very happy!A link in the package would be helpful to many....