Unable to charge the neckband speaker
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When a commercially available USB AC adaptor is in use, make sure that the USB cable is connected securely to the neckband speaker and the USB AC adaptor. Then, make sure that the USB AC adaptor is connected securely to an AC outlet.
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When using a commercially available USB AC adaptor, make sure that it is capable of delivering an output current of 1.5 A or more. You can use a USB AC adaptor with an output current of 0.5 A (500 mA) or more and less than 1.5 A as well, but it may take a very long time before charging completes. Use of a USB AC adaptor with an output current of less than 0.5 A (500 mA) is not guaranteed for battery charging. The charging time may vary depending on the ambient temperature as well.
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You can charge the neckband speaker's built-in battery by connecting the USB cable connected with the neckband speaker to a computer that comes equipped with a USB charging port as well. However, not all the computers are tested and found compatible with this procedure and the procedure is not applicable to home-built computers.
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Depending on the type of the USB AC adaptor, battery charging may fail.
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Battery charging with a computer fails when the computer enters Standby (Sleep) or Hibernate mode. In such a case, change the power settings of the computer and charge the battery all over again.
