Germany's DNP has unveiled the Supernova Flex Screen, which claims to deliver "ten times" the contrast and "double" the brightness compared to standard screens when used in daylight.

ENGADGET: DNP unveils daylight-friendly Supernova Flex Screen

Because RR Lyrae stars have the same average brightness, astronomers use them as standard candle distance indicators.

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The F8500 delivers the same brightness and eight times the black levels as standard LED TVs, thanks to Samsung's proprietary Deep Black Algorithm and Real Black Pro II.

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Our standard battery rundown test involves setting the brightness and volume to half, using 4G in a 75 percent or better signal area, enabling GPS and WiFi (not connected) and disabling Bluetooth while looping a video from a full charge until the battery is drained.

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On our standard Windows battery rundown test, in which we fix the display brightness and loop a video endlessly to exhaustion, the Surface Pro scored just three hours and 46 minutes, despite having a 42.5Wh battery a third larger than the 31.5Wh pack in the Surface RT.

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New features on the Daily Edition include intuitive content zoom, adjustable contrast and brightness control, as well as automatic multiple page creation to make documents designed for a standard sheet of paper easier to read.

ENGADGET: Sony Reader Daily Edition (PRS-950SC) now shipping for $299

In my standard battery test, where I play videos back to back with the screen at 75% brightness and both Wi-Fi and cellular connections turned on, the Tablet P lasted just 5 hours and 16 minutes, about half the battery life of an iPad.

WSJ: Two Screens Aren't Better Than One for Sony Tablet P