Charging Time Is Too Long - Sony WH-CH720N Help Manual

Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH720N

Charging time is too long.

When charging with a computer, check that the headset and the computer are directly connected, and not via a USB
hub. Also, this may be improved by restarting the computer and trying the USB connection again.
Check that you are using the supplied USB Type-C cable.
It is recommended to charge in a place with an ambient temperature between 15 °C and 35 °C (59 °F - 95 °F).
Efficient charging may not be possible beyond this range.
Related Topic
Charging the headset
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