Device may fail to be powered on due to the following factors:
①Battery power is insufficient. Charge the device via the regular USB cable and adapter for 20 mins. Long press Power key to turn on the device for a try (If the battery pack is dismountable, click battery key to check the remaining power);
②Ambient temperature is too low. If ambient temperature is too low, Li-ion battery activity will be reduced, which may cause the device not work normally. Please store the device in a place with suitable operating temperature. Use the device until its temperature recover to normal.
If the above factors have been eliminated, and the issue still exists, please contact us in time.