Z55H Battery, High Capacity Li-ion Replacement Battery for Sony WF-1000XM4 with Glue Tool Repair Kit 75mAh 3.85V/0.29Wh (2PCS)

Replaced the batteries on my Sony WF-1000XM4. Really easy to do with YouTube tutorials. I would caution everyone to use gloves when using the stainless steel guitar pick shaped tool, they can cut you skin. Batteries work as expected. My ear buds now charge fully and last more than 10 minutes.

Included everything needed to change the battery. Follow the iFixit guide to complete it. Battery in one side not charging properly yet-probably something I did wrong rather than a fault with this kit but just to flag the reason for 4 stars

The product shipped does not match the description. Glue was missing from the package. Other items shown in the photos were also not included.

I ordered these batteries for my Sony wf-1000xm4 buds. My head phones were over heating and my battery life was horrible. While replacing the batteries takes patience, It was actually fairly easy. The tools included helped alot! After successfuly replacing the batteries my buds are functioning better than when I bought them!

didn't come with glue

I'm going to preface this and saying that I have a long history of opening up electronics and repairing them. As such I have a basic knowledge of how to properly unhook stuff, temperatures needed to unseal glues, etc. This is a relatively straightforward fix, but requires a significant amount of tech know-how not to screw up your earbuds. So if you're new to this, just realized that there could be a high chance that you permanently destroy your earbuds. I would highly recommend you get someone to do it that has experience. Now a few suggestions that I personally have. Make sure you change them both, don't just change the one earbud that is having issues, because it will cause the other one to have the same fast drain issues. Also make sure that you reinitialize your earbuds once you've replaced the batteries so that it can charge properly. Lastly use a toothpick or some other item to spread the adhesive when you go to reseal the headphones, if you try and squeeze it right out of the tube you're going to get it everywhere but if you do as long as you're quick you can clean it up with alcohol. This fixed my earbuds, and I've hadn't had any issues thus far.

All the tools are great. Sadly mine didn’t have any glue so I had to use another type.

No way to do the job without ruining the ear buds. Ended up in the trash and switches in my fingers.

Muy buen producto hasta ahorita no he tenido problemas con las pilas

El paquete llego sin el pegamento, el cual es es necesario para volver a sellar los audifonos una vez que hemos reemplazado las baterías. De momento las baterias funcionan bien, al principio los audifonos indican 50% de carga, los use así como por una hora hasta que se desvargarón, despues los puse a cargar completamente y ya me estan dando el rendimiento de cuando los audifonos estaban nuevos. UPDATE: Año y medio de uso de las baterías y ya se nota la degradación de las mismas, uno de los auriculares solo me esta durando 2 horas y media de uso continuo, estoy pensando si comprar otras baterías o ya de plano cambiar de audifonos.

No tuve inconvenientes para reemplazar las baterías. Este comentario es sin considerar el desempeño de las baterías, aún estoy por probarlo.

Solo funciono una pila

Llegaron en tiempo y con el contenido indicado en las fotos, sin embargo una de las pilas no se logra cargar al 100%, apenas las cambie el dia de ayer 02 Oct 2024, estaré usando los audífonos con las pilas "nuevas", y daré una nueva opinión.