Z55h Battery for WF-1000XM4 Compatible for Sony WF-1000XM4 XM4 Battery

I was so very very happy to find out this was a thing, I didn't think that I could replace the batteries in my Sony earbuds. They are my favorite earbuds but the right one was only lasting like 15 mins and wouldn't charge correctly anymore. Everything was super easy to do also, the batteries fit just perfectly and they work great. It's like my earbuds are brand new again. So for less than a tenth of the cost of new ones I was able to fix my "old ones". For the money the value is outrageous! Plus I couldn't find my heat gun and just used a hair dryer and it worked just fine. The only problem with mine was that there was a hole/slit in the glue so it was all dried up, I'm sure if I contacted them they would've sent me a new tube of glue but it was easier, and faster, to just go grab a small tube of the E6500 (or whatever it's called), but I didn't take any stars off for that because accidents happen and it wasn't really a big deal. If your earbuds aren't charging anymore or they only last half as long as they used to I would absolutely recommend this for sure, they give you very detailed instructions, it's a video of a guy actually doing the repair and he doesn't skip anything and explains it incredibly well, so I think just about anyone could replace the batteries.

Usé el producto en unos Sony Wf-1000mx4 y después de haber realizado el proceso, el audífono izquierdo falló, no tuvo reparación

Great and very complete system with support. Super easy to replace and my earbuds run like new again. Very good pricepoint too.

Solo una de las baterías funciona la otra venía muerta

The battery worked great but the glue that came with it had dried up on the inside. Had to use e6000 to glue back up the headphones.