Displays a message, 'Not enough battery', at the task bar.
When 10% of full capacity is left:
The caution message pops up several times. From this moment, the device consumes the 10% of charge to keep it alive. If all 10% is consumed, it enters sleep mode and uses the back-up battery. If all is consumed, the device is powered off and all data except in flash disk may be lost.
