When the light indication flashes slowly (about 2 times a second):
The device is being charged.
When the light indication is on continuously:
The device is fully charged.
When the device is powered by the internal battery:
When the light indication flashes quickly (about 4 times a second):
The device is of low battery (less than a quarter of battery power is left). You are advised to charge the battery as soon as possible.
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