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It's not designed to be user-serviceable. That being said, if you're brave, you might be able to replace them if you can find a suitable replacement battery. I did a quick google and couldn't find anything immediately, but in the future you might be able to find something. A thing to think about though, when the battery does finally wear out (likely it will last 4+ years with moderate to heavy use) it may not be worth it to replace it.
Sorry, there was a problem. Please try again later.Hi Connie, The battery of the headphones can be replaced. Please contact your nearest Sony dealer for a battery replacement and for more information. You may find this link helpful (Precautions/On charging the unit): https://www.sony.com/electronics/support/res/manuals/4739/2eec495b883a86351d6d6dbb572385e0/47392791M.pdf ~Ralph
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