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<!-- Generated file, you may edit and discard sony-wf1000xm3-battery.md :) -->
<span class="date">
2025-01-10
</span>
<h1 id="sony-wf-1000-xm3-battery-replacement">Sony WF-1000 XM3 battery
replacement</h1>
<p>I’ve had these since 2021, while they are a bit bulky I am happy with
them and use them mostly around the city to listen to podcasts and the
occasional bit of music.</p>
<p><img src="/media/content/sony-wf1000xm3-battery/headphones.jpg"
class="size-l" /></p>
<p>After they slowly started showing signs of not holding their full
charge anymore, the batteries completely died on me after some 3 years.
I was fully prepared to have to throw them out when I learned that the
batteries are just standard cells and can be easily swapped.</p>
<p>Before you start, get the following:</p>
<ul>
<li>CP1254 A3/LIR1254 3.6V batteries</li>
<li>plastic spudger</li>
<li>(optional) 2 picks</li>
<li>phillips head 000 screwdriver</li>
</ul>
<p>Ok, let’s go:</p>
<p><img src="/media/content/sony-wf1000xm3-battery/01_pry_open.jpg"
class="size-s" alt="pry open" /> <img
src="/media/content/sony-wf1000xm3-battery/02_lid_off.jpg"
class="size-s" alt="lid off" /></p>
<p>Use a spudger or ideally two guitar picks and wedge them into the
thin gap between the top cover and the base of the earphones. Don’t
worry about breaking anything, as long as the material of your tools is
plastic, you won’t damage the headphones. This is by far the most
tedious step of the process (if you don’t have the picks). There is a
little bit of adhesive behind the lid, so once you get the halfs to
seperate you might have to wiggle them loose.</p>
<p><img src="/media/content/sony-wf1000xm3-battery/03_screws_out.jpg"
class="size-s" alt="screws out" /> <img
src="/media/content/sony-wf1000xm3-battery/04_lift_top.jpg"
class="size-s" alt="lift top" /></p>
<p>With the Phillips-head remove the two screws that secure the visible
part in place and then carefully lift it out and flip it over. There is
a ribbon cable connecting the touch sensor and LED on the top to PCB
inside the earpiece.</p>
<figure>
<img src="/media/content/sony-wf1000xm3-battery/05_battery_out.jpg"
class="size-s" alt="battery out" />
<figcaption aria-hidden="true">battery out</figcaption>
</figure>
<p>To remove the old battery I found it easiest to push the spudger into
the little gap in the plastic where the ribbon cable connects to the top
part. It is also glued in; be careful not to pull out the contact points
as well. If possible try to preserve the glue, it will come in handy
when securing the new battery in place. I also scraped off what was
stuck to the old battery and pushed it back into the housing.</p>
<figure>
<img src="/media/content/sony-wf1000xm3-battery/06_battery_in.jpg"
class="size-s" alt="battery in" />
<figcaption aria-hidden="true">battery in</figcaption>
</figure>
<p>Before putting in the new battery make sure to check the writing on
it or use the shape as a reference to figure out which side is the
negative pole. Put that side down, touching to the contacts. The
replacement batteries I got where a different brand and had all the
labeling on the plus pole. While the original VARTA branded batteries
had it exactly reversed. On my first attempt I didn’t pay attention and
put them in the wrong way around.</p>
<figure>
<img src="/media/content/sony-wf1000xm3-battery/battery_comparison.jpg"
alt="battery comparison" />
<figcaption aria-hidden="true">battery comparison</figcaption>
</figure>
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