𝟮𝟬𝟮𝟲 𝗡𝗲𝘄 𝗨𝗽𝗴𝗿𝗮𝗱𝗲𝘀 Z55H Battery, Compatible with Sony Headset Battery for WF-1000XM4 • Truly Wireless Earbud Headphones Battery+ Tools [2PCS]

If you’re reading this, there’s a good chance you’re dealing with the known battery defect on the Sony WF-1000XM4 earbuds. I bought a used pair on eBay as an upgrade from my Pixel Buds A, but the battery life was awful—barely 10–12 minutes, wouldn’t charge past 50–60%, and the earbuds got so hot the case would blink red. After some research, I bought this battery replacement kit and I’m extremely satisfied. The kit completely revived what were essentially unusable earbuds and restored the battery life to its original expectancy—they honestly feel brand new again. I’m fairly tech-savvy and found the repair straightforward, though having an extra tool like a small clamp helped when opening the earbuds, and there are plenty of YouTube guides if needed. Overall, this kit absolutely saved my purchase and is well worth the money if you’re experiencing the same issue.

This kit had everything I needed to change out the batteries in my Sony earbuds. It ships with the exact same brand of battery used in the original configuration. The installation is a little tricky, but there are plenty of online how-to videos to show you how to get it done. The new batteries REALLY do a good job of holding a charge! BEWARE... most how-to videos say that you have to heat up the outside casing of the earbud to loosen the glue that holds the 2 halves together. I used a heat gun. Don't make the same mistake I did! Wear gloves, hold the earbud a good 8 to 10 inches from the heat gun outlet as it produces a lot of heat. I also recommend that you remove the ear tips. DO NOT use plyers to hold the earbud by the stem where the ear tips attach. It is very thin plastic and with the heat, they will begin to melt very quickly. I found this out the hard way. Fortunately I was able to coax the stem back into shape and it did not damage the function. In the end, this is a fine kit to replace Sony batteries (on compatible models) when used correctly!

There is a lot of unnecessary stuff in the bag, especially if you already own some tweezers and prying tools, but the batteries are great. My earbuds are back to charging all the way and lasting as long as when they were new!

**Product Review: SONXIAVIVO 2024 New Upgrades Z55H Battery** The SONXIAVIVO 2024 New Upgrades Z55H Battery offers a seamless replacement experience for Sony WF-1000XM4 Truly Wireless Earbud Headphones. Here's what I found: **Positive Points:** - The package comes with useful tools for hassle-free battery replacement. - Thoughtful packaging ensures the components are well-protected. - The provided glue features a long, thin tip for precise application, aiding in clean placement. - Affordable pricing considering the quality and quantity of items included. - Battery replacements fit perfectly without any compatibility issues. - Batteries hold charge effectively, ensuring prolonged usage. - The product fulfills its intended purpose efficiently. - Accurate description matching the actual product. - Swift shipping and delivery ensure a prompt replacement process. **Areas for Improvement:** - If you already own pointed tweezers and electronic plastic tools, consider purchasing only the batteries. - The included tweezers lack a strong grip, which may be challenging when handling small cables during installation. **Overall Opinion:** The SONXIAVIVO 2024 New Upgrades Z55H Battery is a reliable solution for extending the lifespan of Sony WF-1000XM4 earbuds. With its user-friendly design and efficient performance, it's a recommended choice for those seeking affordable and high-quality battery replacements.

Overall it was a very complete kit with picks, pry tools, 3 small screw drivers, a razor blade and some finger sleeves. If you already have tools, these tools will seem very flimsy and probably won't last. I ended up not using any of the tools but the small tube of glue has a needle point tip for precisely applying a small bead of glue around the whole seam of each ear bud without making a mess. You will have enough glue left for probably another 20 earbuds. Lastly there was come discoloration on one of the batteries but tested within spec with a multimeter. It was worth it for just the two batteries and the tube of glue. The only thing missing was a heat gun but you can't expect that at this price point. My earbuds have the same capacity as when they were new but only time will tell if they last. I will update if they fail prematurely.

All you need to get this job done. Blue prying tools( not the triangles) the plastics are on the soft side so be aware to not pry to hard. Patience is key for this fix. This tool set is great. The glue is perfect d/t its fine tip. Will update battery quality and value of money.

Almost everything I needed to replace the batteries in my bt headphones. I used some pliers to very carefully crack them open like a nut cracker to access everything. Watch some vids, plan it out, be meticulous and careful and they'll go back together like nothings changed. After a few months of use they work great and last like when I first bought them. I noticed after a while one of them wasn't together as tightly as the other so cleaned and put a better bead of glue and it was perfect again. Will buy again.

The most important part: the battery replacement worked and now I don't have to pay hundreds on new headphones. Adhesive worked great and was easy to apply. The included tweezers were so flimsy I couldn't use them to hold a tiny ribbon cable so that was not really needed. I had to use a magnifying glass on a base while I worked to see what the heck I was doing. There was a ton of stuff in the package that was not really needed.

Muy buenas baterías.