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Tolles Video, hat mir sehr geholfen! Vielen Dank und schöne Grüße, Reinhard

Which one is better varta or zeni?

Anyone know what size the screws are? I may have lost two...

Great guide! I just upgraded to A4 version which has the higher capacity and it works great!

Great video, managed to upgrade to A4 variant and everything works flawlessly! Getting better battery time than new now.

From 71 to 105.5 it make +50% not 74%.

Just performed the replacement successfully, thanks for this video! couple extra thinks to look out for: 1- as other said, look out for the led's on the bottom of the board, take your time and open the perimeter in small steps, do not go deep with the picks. 2- my replacement batteries came wrapped with an amber, adhesive tape film that needed to be removed prior installation 3- watch out to not short the batteries! the metal contact bends upward and that upward part needs to be phisically distant form the side walls of the battery. I made this mistake initially and the battery got very hot. Luckly I was able to recover it but be careful! 4- removing the old battery was quite more difficult than shown in the video. Personally the best tactic was to really push down with the plastic lever to really get under the adhesive before prying.

After learning your instruction, i was succesful in changing the batteries. But i can't reset or initialise the buds. Can you tell me what i should do. Thanks in advance !

When the battery popped out the earbud twisted in my hand ripping off the ribbon. Be really careful it lets go quickly. I knew the risk and a 15 min left earbud was mostly useless anyway. It still connects and I can hear just fine. I assume the noise canceling isn't working but I also don't use it much since outside it's terrible.

ATTENTION: Be very careful also with the metal clip, I misunderstood that it needs to aligned with the adhesive and tried to put it back and short circuited the battery. It's better to put the metal piece into place since there is this small stopper which will keep it in place.

Just wanted to say thank you. Worked perfectly for me. Thanks again

inside under the cover is a flat capacitive sensor coil. There is a black jelly-like plastic there and it serves as a seal or glue to transfer the charge from your finger through the cover to this sensor. So after the headphones are assembled - the sensor stops working because this glue is disposable. Having torn it off, it no longer conducts the signal for the reason that the contact is not tight. How to glue or what to replace this glue?

ZeniPower is garbage. 50% discharge after 60min

Thanks for this awesome guide !

MY BATTERY AFTER REPLACEMENT THE BATTERY WAS HEATING UP FROM THE MOMENT I CHANGE IT AND PUT THE METAL PLATE ON IT WHY ?

The screws size in my earbuds are smaller, it's been hours and still can't open it.

This worked. Thanks so much. Picked up the Ifixit kit as well. Seems excellent for the price

thank you very much 👍👍👍

After changing battery, no sound is coming from left bud Nothing seems to be broken plus all leds etc are working and touch controls also working fine Can anyone help?

Thanks for this. My right side earbud is crapping out. I'll try replacing the batteries following this guide. The link to the battery no longer works. Is there another source you can recommend?

worked great. the case is a little trickier to open than I thought but got there eventually

hi. i connected my dock case with 10volt charger. then the case is broken and can't be charged anymore. does replacing the battery help?

Thanks for the tutorial. Mine comes with "ZeniPower Z55 Li-ion 3.7V 0.24Wh". Only found out after opening and purchased the same one you used but it works.

My right earbud has no sounds. How can i fix it? Any suggestion? Touch controls are working

I changed one side and it worked. For the left side, however, the touch control doesn't work when the lid is on. The red LED is flickering and I manage to do a factory reset (with blue LED blinking). More importantly, I hear no sound coming out and no blue LED is blinking once I remove it from the charging case. Did anyone encounter similar problem? Resetting it without the lid didn't help so far

hey good video, things i learned while trying this 1. the flex cable is really... REALLY fragile, especially if you have an old one, don't bend it. i bent mine and it basically broke clean off. so now i don't have touch controls on 1 of the sides. waiting to see if charging still works, hopefully it does. but sound definitely comes out 2. when you're prying it off, there are tabs/clips that can very easily break off, try not to pry on 1 side and rotate around like i did. that'd break the tabs for sure. 3. get the varka batteries. i cheaped out and bought some batteries from china. worst decision ever, as soon as i put the metal tab, it made contact with the positive side and turned my battery into a heater. this one should be pretty obvious but.. not for stupid old me lol good luck to anyone trying this, take ur time, be careful

Maybe you can help me. I changed the battery as instructed. The earbud will function but not load and does not give a red light. The case itself shows a red light, even if the other earbud is not present. What can the problem be? And is there a solution? Thank you

Hi, i followed the steps in the video, but the earpiece that i have replaced overheats very quickly upon charging. Do you know what is the reason for this? Did I place the contact wrongly?

Just a side note, do remember to remove any plastic that is wrapping your battery. You might get a scare when you try to turn it on if you don't. I know I did :(

Thank You. Great video.

sadly this batteries are not avaialable in India can u suggest me other compitalble models ?

if i want u to replace my Sony wf-1000xm4 battery for both ear buds, how do i send them to u, what does it take and how much. please let me know. thank u.!

Your math is so wrong. If the old batteries did 71 minutes and the new batteries did 105.5 minutes. Thats a 48.6% increase in batterylife going from old to new.

Tip for anyone that finds the touch controls aren't working when you put the top cover back on. I found the touch controls worked fine with the new batteries without the top cover, but as soon as I put the top cover back on, the touch commands stopped working (for both buds). I found that I needed to reset the buds. Put the buds back in the case, the red LED (per bud) should light up indicating charging. Press and hold the touch button (one bud at a time, with the buds in the case, and with the top cover on). After around 15 seconds the red LED will start flashing, keep holding the touch button. After a couple more seconds the LED with flash faster, then a couple more seconds the LED will turn off. Once the LED goes off, stop pressing the touch button. The LED will come back on after a second or two to indicate it's charging again. Repeat for the second bud. Once I did that I found the touch commands were working again. The reset will not change any of your pairing settings, so you won't need to re-pair to anything. It's weird. Obviously the touch is working to some extend, otherwise the reset process wouldn't work, but when paired with my phone it would not work with media commands (play/pause/skip) without me doing the reset.

Can anyone help. I unpaired my earbuds from a Samsung phone and now cannot get them to pair to anything including the phone.I have tried the factory reset but it still won’t connect. I have tried a few devices and nothing works. Thanks

Hi there guys. I was able to replace the battery and all works just fine! Thanks for the tutorial. However, I am not able to "click-in" those two parts together anymore and I was wondering what to use in order to make them hold together better. I ordered B700 adhesive glue. Do you think it will work? Thanks

Awesome, I just finished replacing mine. The new batteries came fully charged with a small tab on both sides for some reason, so i put the battery in with the tabs pointing into the battery and held it closed for a few seconds to see if the led would start blinking, but immediately notice the battery getting hot. so I removed the battery and installed it with the tabs facing the opposite direction and checked again for heat and power, and it worked great. Tested with charger and phone, no issues yet.

That's one of the reasons because I moved from Bose to Sony in NC earphones and headphones. Bose tells you to buy a new unit when the battery span life runs out.

Thank you for the video, helped me immensely. When I reached out to Sony Pakistan to fix the earphones, they said that they could not import the official batteries, and if I was able to source them they would charge me to fit the batteries, plus they mentioned that they may bear marks due to opening the earphones. I was able to follow your video and there are no marks, am charging the earphones, so fingers crossed.

Great guide, thank you! One thing that was different with the battery I got was that the side with the writing on was the POSITIVE side, I very quickly realised and flipped the battery over and now all is good. Also, I had to be careful with the ribbon cable that is attached to the touch sensor when first opening the ear bud up as that was attached to the outer casing.

Hello this works for xm4?

Thank you so much for this! I love my headphones but after a few years of heavy use followed by the pandemic and almost no use batteries were pretty dead. You, kind sir, saved me a few hundred dollars for new headphones and prevented generating unnecessary electronic waste. Big kudos! One note - when lifting the battery - it's much easier to do from the side where the ribbon is. If you go from that side you're also more likely to only extract the battery which saves you the effort on re-aligning the contact

Thank you, that worked well. I was a little bit surprised that the batteries where already that bad after "just" 3 years, but i guess it is because of the size.

ich habe zwei neue cp1254 a4 akkus verbaut, da meine alten akkus nur noch sehr kurze akkulaufzeit hatten. der austausch war nicht so einfach wie gedacht. zunächst hatte ich probleme die kappe abzubekommen, mir hat es geholfen an der vorderseite eines der plastikstücke zwischen deckel und kopfhörer zu schieben um die verklebung zu lösen. dabei sollte man vermutlich aufpassen, das plastik nicht soweit nach hinten zu schieben um das mikrofon nicht zu beschädigen. dannach habe ich die schrauben entfernt und die akkus herausgenommen, auch das herausnehmen der akkus war nicht so einfach wie gedacht. auch hier musst ich mehr kraft anwenden als erhofft, jedoch fuktioniert es so wie im video gezeigt sehr gut. dann habe ich die neuen akkus eingebaut und die kopfhörer haben zunächst nicht funktioniert bei einem habe ich beim aufdecken der batterie (wie in minute 4) so wie in einigen anderen kommentaren beschrieben die led kaputt gemacht. bei dem anderen kopfhörer hat diese zunächst nur geflackert wenn ich ihn in das ladecase gepackt habe. also habe ich die kopfhörer wieder aufgeschraubt und die akkus nocheinmal herausgenommen, dann habe ich den metall kontakt der akkus etwas nach oben gebogen, also die akkus von diesen entfernt, den metall kontakt ohne batterie in den kopfhörer eingebaut und dann die lippe unten in der mitte hochgebogen, anschließend den akku darauf gelget und dann zugeschraubt. dann haben beide kopfhörer wieder funktioniert, sohwol noise canceling als auch die touchfunktionen sind noch intakt, obwohl ich befürchtet hatte diese durch zu viel kraft einwirkung kaputt gemacht zu haben.

The earbuds blue light doesn't turn on when removed from case. It is always red in the charging case and earbuds. Please suggest

Thanks for this. I had trouble getting the batteries in the UK but finally sourced the A4 version which fit the same. So far, so good.

merci grâce a vous ,je viens de donner une 2eme vie à mes écouteurs !!!

Hello. I changed the batterys but now i have a problem. When i put both the headsets in the case the red light start blinking and i can t connect them anymore. Can u help me pls? Thx.

i was surprised that the new batteries only gave you 106 minutes. Ideally, when new, the earbuds should provide 4 or 5 hours of play time right? So, would a better solution be to try 90 mah batteries?