The Sony WH-1000XM5 is a wireless headset that comes with an internal battery that can be recharged. If the charging is taking longer than what you are expecting, then you can take a look at this troubleshooting article from Seeking Tech.
1. Before we start, it is important to note that it may take as long as 3.5 hours to recharge the wireless headphones if the internal battery has been completely depleted.
With that said, you can still get a decent amount of usage out of the WH-1000XM5 with just a few minutes of charging. To learn more about the fast charging or quick charging feature of this product, you can take a look at this post.
2. If the headset is still charging after more than 3.5 hours have passed, then you should make sure that the USB charging cable is connected directly to the USB port of the USB AC adaptor or compatible device.
An USB hub or USB pass-through device may reduce the output current. For the uninformed, Sony recommends recharging the WH-1000XM5 with a device that has a minimum output current of 1.5 A.
3. For the best compatibility, you should use the USB Type-C to USB Type-A charging cable that came with the wireless headphones.
4. Make sure that you are recharging the WH-1000XM5 within the recommended temperature range of 59 °F to 95 °F or 15 °C to 35 °C.
If you try to recharge the battery at a colder or hotter temperature outside of the recommended range, then it may take longer to fully recharge the battery.
5. If the internal temperature of the headset gets too hot, then it may also affect the charging speed.
In this case, we recommend that you turn off the WH-1000XM5 and unplug any cables attached to it. You can then let it cool down on its own before you try recharging it again. To speed up this cooling process, you can put the headphones near a fan.
To find out more about how you can deal with an overheating WH-1000XM5, we recommend that you check out this guide.
6. If you are using a device that has multiple USB ports to recharge the headset, then you can try using a different USB port to see if doing so will improve your charging speed.
7. You can also try looking at the settings of the other device, if possible, to see if there is anything you can change to make the recharging process faster for your WH-1000XM5.
8. You can also try restarting the connected device to see if a reset will improve the speed.
9. If the connected device automatically goes to sleep mode, rest mode or low-power state mode, then the charging speed may slow down or completely stop.
Therefore, you should make sure that you turn off these modes if you have them activated on the connected device.
10. You can also simply use another device or adaptor to recharge the WH-1000XM5 to see if switching the power source will improve your situation.