The FC PowerTrekk charger converts water into electricity to power a mobile.
Editor's note: Will Findlater is editor of Stuff, one of the world's best-selling gadget magazines. Follow @stufftv on Twitter.
(CNN) -- The last full day of the Mobile World Congress show in Barcelona has drawn to a close. After a bonanza of new phones, tablets and mobile gadgets, here's the last of what's new at this year's show, courtesy of Stuff Magazine.
Quad-core arms race 'ridiculous'
Microsoft Windows Phone Director Aaron Woodman has stated his belief that competition between manufacturers to produce phones with faster and faster quad-core processors is unnecessary. "The quad-core arms race is ridiculous," said Woodman. Instead, he explained how Windows Phone devices like the Nokia Lumia 800 are able to run fast without using battery-sucking quad-core innards. Microsoft has even gone as far as handing out €100 ($133) to anyone whose phone can beat a Windows Phone in a one-on-one user test during MWC.
Sketching out the future of mobiles
BlackBerry in your car and in your hands
Microsoft releases Windows 8 preview
Microsoft announced the release of the consumer preview of its forthcoming Windows 8 operating system. The new software is designed to work on both computers and tablets, taking many design cues from its own Windows Phone 7 software. The company said it has made a staggering 100,000 code changes since the last preview. Early testers will be pleased to know that all apps in the Windows 8 app store are free to download during the preview.
LG phone delayed by UK's lack of 4G
LG's recently revealed Optimus Vu smartphone, which sports a 5-inch screen with an unusual 4:3 aspect ratio, won't be seen in the United Kingdom for at least a year. The long wait is due to the UK's lack of a 4G or LTE network. Other countries such as the United States are already enjoying super-fast 4G mobile data speeds while the UK lags behind.
Samsung previews projector phone
A prototype of the Samsung Galaxy Beam projector phone has been doing the rounds. The smartphone prototype runs on Google Android 2.3 and has a 15 lumens projector built into its top edge. Users can beam a 50-inch image on a blank wall or screen, perfect for showing off holiday snaps or giving impromptu presentations.
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A wireless in-car phone charger created by Duracell and Powermatt .
A man displays a Sony SmartWatch conected to a Sony mobile phone during a presentation at the Mobile World Congress on February 28
The Asus padfone, part phone, part tablet, part laptop, this is the Russian doll of the mobile world.
Fujitsu's speedy quad-core smartphone prototype has a 13.1-megapixel camera on board and is waterproof.
Huawei's MediaPad 10 FHD is a 10-inch tablet boasting super-fast processing speeds.
Samsung smartphones will soon be able to connect with Toyota's In-Vehicle Infotainment (IVI) system
The stylus is back! The Samsung Galaxy Note device has reintroduced the tool for more accurate touch screen control.
Samsung's Galaxy Beam features a built-in image projector
The fastest phone yet? BlackBerry showed off a device that pairs with a Porsche 911
Nokia raised eyebrows with its new PureView smartphone, boasting a 41 Megapixel camera.
Motorola shows off its combined GPS tracking device and MP3 player, which also acts as a workout coach and tracks a user's performance.
People wander through the Android display area. With no official Apple presence at the Mobile World Congress, Android phones dominate.
Demonstrators dressed in curious bobble hats staff a Nokia stand at the Mobile World Congress in Barcelona.
Duracell showcases its Powermat WiCC which can be used to wirelessly charge specially-adapted electronic devices.
The robot symbol of the Android operating system guards a display at the Mobile World Congress in Barcelona.
A hostess holds a LG Optimus Vu, which boasts one of the biggest screens seen on a smartphone.
Taiwanese phone giant HTC launched its new One range, featuring toughened Gorilla glass screens.
Ford's launched its technology-stuffed B-Max car at the Mobile World Congress to tout its hi-tech credentials.
Nokia's Lumia 900 mobile phone
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