𝟮𝟬𝟮𝟓 𝗡𝗲𝘄 𝗨𝗽𝗴𝗿𝗮𝗱𝗲𝘀 𝐙𝟓𝟓𝐇 𝐁𝐚𝐭𝐭𝐞𝐫𝐲,Compatible with Sony Headset Battery for WF-1000XM4(𝟐𝐏𝐂𝐒)+with Installation Tools Kit

Breathed new life into my long dead XM4 earbuds. Cells appear to be genuine Zenni Power cells.Despite careful work, I did break a small cable (90° cable not sandwich cable) and there doesn't appear to be any impact on use and functions. Sure it does something but touch, anc/passthrough, so on all works fine so who knows. I am ecstatic to have be beloved buds back.

Fit and worked great.

These arrived quick. Easy enough to install and after charging my earbuds (wf-1000xm4) they appear to be holding charge well again.I replaced both left and right earbud batteries as I had time, and wanted to test longevity with the new replacements. Before, the right earbud would lose charge, go from 100% to 0% in an hour or less. It would also heat up in the charging case, and overall caused the case to drain quicker as well.Opening the earbuds was easy with a heat gun and spudgers. Replacing the battery took little finesse but still easily done. I did a quick test to the earbuds with a small charge before glueing. Just to be sure no other components were damaged. I let the glue cute for a full 24 hours while the earbuds were in foamed clamps to prevent damage/scratches.So far after about an hour and a half of use these new batteries went from 100% charged to 93%. Great improvement from before. I will continue this review as time passes.

To be honest, this pack comes with a lot of tools, but all you really need are the tweezers, picks, a plastic lever, the finger glove, and glue—of course, the batteries too.Besides these, a heat gun and a clamp are necessary. It's not difficult work; all you need is patience and careful attention.If you already have the right tools, I’d recommend just buying the batteries, which is why I gave it 4 stars. Now, I need to check how long the new battery lasts after a full charge.

Great replacement and it worked perfect

Only one of the two batteries worked. The other was defective. I know this to be true because I can put the old battery back in and use the earbuds. Wanted to get this replaced but Amazon wants me to take time out of my day to drive an hour to a UPS to return the item for a replacement which would cost me more in gas than it would to buy from another seller.

4.5 stars, battery is good, but the included tools were not very helpful. The battery replacement wasn't too bad. I broke the tiny metal tab that was making contact to the battery from the PCB on the top and I used copper tape to make connection. The instructions were OK, but better to watch some Youtube videos.

I didn't find a better price anywhere else to get two batteries. Besides the batteries, the glue, and the opening picks, everything else was pretty useless. They seem to be holding up well after replacing them, but I'll update if I start to see any changes. I was not lucky like some folks that got a free replacement pair, so I decided to change them myself and it was incredibly easy.Update (7/15/24):Significant difference in battery life after changing batteries on both the earbuds! My original ones were so bad they didn't reach a full charge, so it's nice to put these on now and hear "fully charged". I went through my whole 2 hour workout without having to stop to recharge one of the earbuds. Instead I don't think they got below 97% afterwards! Will keep updating on my experience, but hopefully I don't have to replace them again for another 3 years!