Battery
The battery is made of lithium-polymer technology (Li-pol). Referring to the words of witnesses, I can assure you that when listening to music regularly, and are rarely connected to the Internet, charging enough for two days. And this despite the fact that its capacity is 1500mA / h. It would be very strange if such a complex device, gifted a large display size and resolution, would be able to work a long time without recharging.
But the algorithms of autonomous work, no one canceled. For example Xperia X1 has a built-sensor light, so that automatically reduces the brightness of the display (unless of course it allows the degree of illumination veshney). Furthermore, the inclusion of the lights can be configured for each action separately. As an effective way of extending the autonomous device is the ability of the module Wi-Fi to work in the mode of energy conservation (as implemented).
The producers have the following options:
- While reading - The minimum load. Screen put on a minimum level. It is very easy to read
- Mode MP3 - load, while playing music. When it turns off the screen completely, but the volume remained at average levels. MP3 files are playable with a bit rate from 128 to 320
- Using the full (maximum) load. Ideal for watching movies

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