Speaker is not charging - Model SC-GNW10

When using a USB AC adaptor that is capable of supplying an output current of less than 1500 mA at 5 V DC, proper charging may not be possible. Use a USB AC adaptor that is capable of supplying an output current of at least 1500 mA at 5 V DC. If the USB AC adaptor or computer has a number of outlets, check the supply capacity of the outlet you are using.
Charging may not be possible with some USB AC adaptor models. Try a different adaptor.
If you are charging multiple devices on the same USB AC adaptor, unplug the other devices.
Are you using the supplied USB charging cord? Charging may not be possible depending on the specifications of commercially available cables.
Charge at an ambient temperature of between 5 oC and 35 oC (41 oF to 95 oF) (permissible ambient temperatures). Even when within the permissible ambient temperature range, a temperature increase may be detected in the battery during operation or immediately after ceasing operation, making it impossible to charge. If this happens, stop using and allow SC-GNW10 to cool down.