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Battery life is related with CPU usage. Close all unnecessary applications. Some applications may not be shown on running program list. 1. Some applications running in the background may cause unwanted battery consumption. To close an application, use the back key rather then the home key. (The back key will close most applications, while the home key will place applications in stand-by mode.) 2. You can view the number of current running applications with Program monitor widget. (Some applications may not be shown.) Be cautious when installing unknown or unsecure applications, as this may cause excessive battery consumption.  3. After setting up a Google account, data communication takes place in the background. To extend stand-by time, deactivate Auto sync under Settings > Accounts and sync, and synchronise manually when necessary.  4. Keeping Wi-Fi and Bluetooth on is often the main acuse of battery drain.  5. In the event of excessive battery consumption or phone malfunction, restart the phone by pressing the power key for 8 seconds, or by pressing and holding the power key and selecting Power off.  If any of these do not work you can alternatively purchase a XiaoMi external power bank from our store. 

How Blue-light is harmful and where is it from? Our eyes detect a narrow band of wavelengths referred to as the “visible light spectrum”, which consist of the three primary colours: Blue (380–490nm), Green (490–590nm), and Red (590–780nm). These wavelengths transmit through to Retina, a light-sensitive layer of tissue lining the inner surface of the eye, and are ultimately sent various visual centres of the brain.As mentioned, blue-light (380–490nm) is being shorter in wavelength, thus carries more energy compare to other visible light. If light is allowed to reach retina directly without any protection mechanism, blue-light can inflict more damage on retina than the other colour. Research has determined that the lens inside our eye is able to filter out Red and Green light as they carry less energy. However, it is not able to filter out the high energy blue light. Adolescence and prepubescence are more vulnerable to such damage than matured adults, which permits more light to impact on the sensitive retina. Light from electronic devices is the light source we are most exposed to in our daily activities, only second to light from natural sources. Because of the wide spread and heavy use of electronic devices nowadays, such as monitor, TV screen, tablet and smart phone, it has drastically increased our exposure to the dangerous blue-light.   Consequences of chronic exposure to Blue-light The biggest threat of blue-light to our vision is the development of age-related macular degeneration. Macular Degeneration Sight without impairment Sight with Macular Degeneration   Eye Fatigue Long period of working with electronic devices increase the burden on our eyes are will result in eye fatigue and hamper on individual productivity Myopia Early development of Myopia Red Eye Syndrome Eye with sufficient rest and average exposure to blue-light Eye after enduring exposure to blue-light Sleeping Quality Exposure to blue-light research has shown that inhabit melatonin secretion and disrupt our sleeping quality Presbyopia Early development of Presbyopia