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publié le 29 septembre 2017 Beauté › Maquillage

2. A truly "smart" smartphone works hard to utilise its batteryIt's not all about the quality of battery. How a smartphone's OS uses the power especially for frequently used functions like apps and multimedia is equally important.Huawei is innovating here too. The Ascend Mate7 utilises an intelligent Huawei Kirin 925 processor, comprising four large A15 1.8 Ghz and four small A7 1.3 Ghz chipsets. These are activated in different configurations for different functions, resulting in smart power management The Ascend Mate7 saves up to half of its battery by automatically using smaller cores to power simple apps, and kicking in the larger A15 chipsets during demanding tasks, such as gaming. The processor also activates additional cores when it detects that 85% to 95% of a single core's capability is being used.The Ascend Mate7 and Ascend P7 both feature three power modes. Super-saving mode on the Ascend P7 stretches the remaining 10 percent of battery power to last 24 hours on standby, dimming the screen and just keeping basic functions like voice calls and contacts running.

How an OS manages apps is also instrumental to battery efficiency. Social networking apps can eat up to a third of battery life, even running in the background. Huawei's EMUI OS comes with a new one-key (EMUI 2.3) or upwards swipe (EMUI 3.0) power-saving and all-round power consumption test feature. These allow users to monitor apps' power consumption, adjust the backlight, and assess status of GPS services. Such functions can save up to ten percent of battery in just 10 hours, by shutting down background apps.This article was taken from the October issue of Wired magazine. Be the first to read Wired's articles in print before they're posted online, and get your hands on loads of additional content by subscribing onlineEach month Wired’s chemist Dr John Emsley, author of nine books and 110 research papers, deconstructs an everyday product. This month: Energizer lithium batteries

Retouch your face, treat bipolar disorder and create nuclear fusion, while powering an alarm clockThe lightest of all metals, lithium is also used in greases, to treat bipolar disorder and in hydrogen bombs. In a battery, current is generated at the anode and the cathode, and involves a transfer of electrons.The chemical reaction begins when the battery becomes part of an external circuit through which the electrons flow between electrodes. The lithium atoms release electrons to become positive ions (Li+); the manganese atoms gain them, thereby going from Mn4+ to Mn3+.Lithium stearate is made from stearic acid, a fatty acid that’s a component of most lubricant greases. It stays soft at temperatures as low as -60˚C and is used on vehicles in the Antarctic. A component in hydrogen bombs is lithium hydride, in which lithium is the lithium-6 isotope and the hydrogen is the hydrogen-2 isotope, also known as deuterium. To dissolve charged ions, in this case Li+ and ClO4 –, a solvent is required; but water reacts too violently. Propylene carbonate (C4H6O3) works but needs diluting with dimethoxyethane (C4H10O2). In other uses C4H6O3 is a base for lipstick, and C4H10O2 is used in pesticides.

This is the salt lithium perchlorate (LiClO4) dissolved in a solvent and which provides a conducting medium between the anode and cathode.This compound solid has always been used in dry-cell batteries. MnO2 occurs naturally, as pyrolusite, which is mined on a large scale but it must be processed to remove impurities before being incorporated into batteries. MnO2 is also the black pigment commonly used in prehistoric cave paintings.This article was taken from the January 2015 issue of WIRED magazine. Be the first to read WIRED's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online. WIRED compared form factors for style, ease of use and suitability to being both a tablet and a laptop. We used a Valve's older game Half-Life 2: Episode 2 to gauge 3D graphics performance. As benchmarking the different operating systems on offer wouldn't really compare like with like, we based ratings on real-world usage: browsing popular websites and navigating between pre-installed applications.With its Windows 8 Surface Pro 3, Microsoft proves that if you want something doing right, you have to do it yourself. The 12-inch, higher-than-HD, 2,160 x 1,440-pixel screen is pin-sharp, and a 1.9GHz Intel Core i5 CPU and 4GB of RAM ensured Half-Life 2:

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Episode Two played very comfortably at near-maximum graphics settings. Although it has the performance to replace your laptop, you'll need the £110 keyboard/cover -- pricey, but a worthwhile investment. 7/10; from £639; microsoftstore.comUnlike the rest of this Test group, it runs Android and, as such, adopts a tablet first, PC second approach to productivity.Performance from the 1.9GHz CPU and 3GB of RAM was nippy underneath the 2,560 x 1,600-pixel screen, but despite its impressive spec, it's not a true laptop replacement -- the lack of custom corporate software compatibility alone may preclude it from any truly "pro" usage. 7/10; from £400; samsung.comLenovo's 11.6-inch Miix 2 has a 1.6GHz i5 CPU and 4GB of RAM, but it's a bit sluggish -- Half-Life 2: Episode Two at full HD is unplayable. But it's fine for everyday use -- and it comes with a keyboard. 6/10; £599; shop.lenovo.comMicrosoft thinks its Surface Pro 3 is a MacBook Air killer. The Pro 3 easily beats the Air in terms of chip speed (1.4GHz vs 1.9GHz) and resolution (1,440 x 900p vs 2,160 x 1,440p), but the Air is still extremely capable -- plus it can run Windows 8 if you prefer. And unlike the Pro 3, it has no tablet/laptop identity crisis. From £849

This article was taken from the November 2014 issue of WIRED magazine. Be the first to read WIRED's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online.The Tesla Powerwall is essentially a giant lithium-ion battery pack, designed to store solar energy, and provide a back-up power system for blackouts or during times of low power generation.Unveiling the system, Tesla CEO Elon Musk said that the system would be able to power entire homes and businesses for short periods, and would be the first step towards a genuinely transformed energy grid. The units had the potential to be "a critical step in this mission to enable zero emission power generation", Tesla said in a statement."With Tesla Energy, Tesla is amplifying its efforts to accelerate the move away from fossil fuels to a sustainable energy future with Tesla batteries," the company said, "enabling homes, business, and utilities to store sustainable and renewable energy to manage power demand, provide backup power and increase grid resilience."

The Powerwall system will initially come in two sizes -- a 7kWh model ($3,000 or £1,949) and a 10kWh version ($3,500/£2,274). Both are internet-connected, and small enough to hang on a garage wall, and will only be enough to run a house for a few hours at a time, but will automatically recharge when connected to a power source and when not in use. The idea is that the batteries will provide an ever-present, reliable backup, and help individuals rely increasingly on solar power and other zero emissions systems rather than fossil fuel plants.Musk also unveiled the "Powerpack", a larger system of 100kWh designed to allow cities and towns to store and distribute power over time. The design helps solve an obvious issue with solar power, which is that more power is needed at night -- precisely when less power is being generated. Many other companies are attempting to solve this problem, and solutions for both home and civic use have been proposed in several forms. Tesla says its experience building batteries for electric vehicles gives it an advantage, however, and the relatively low cost of the Powerwall should prove attractive to early adopters.

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Tesla said the batteries will be built first at its California factory, but will eventually be made at its new "gigafactory" in Nevada, when it opens in 2017. "Tesla is not just an automotive company, it's an energy innovation company," it said. "Tesla Energy is a critical step in this mission to enable zero emission power generation."This article was taken from the October 2011 issue of Wired magazine. Be the first to read Wired's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online.It'll give you the tactical advantage, but it will take more than a padded sleeve to keep it safe. You need the modular tactical system (MTS), created by Black Diamond Advanced Technology, an Arizona-based company specialising in ruggedised electronics. The releasable body-armour vest (RBAV) made by BAE Systems is designed to carry both anti-ballistic plates and the high-spec MTS. The front plate-carrier folds down to reveal a toughened touchscreen display, and the processor, power supply and cabling are secreted throughout the vest to distribute weight. A GPS module is located across the rear shoulderpad for optimum signal-strength, and a side-mounted USB hub allows rapid swapping of optional equipment such as laser rangefinders that can pinpoint targets.

Norman Lange, director of product development for Black Diamond, says the MTS "has already been used by US special forces in Afghanistan, but it's also suitable for certain non-military applications such as border security, drug enforcement, Swat and disaster response -- tasks that demand a high level of situational awareness." Time to join the USB Marine Corps.Microsoft Store is offering you the chance to win one of nine Surface Pro 3's (128GB, Intel i5, 4GB RAM) over the next three weeks, as well as a very special grand prize, that will include: For a chance to win, all you have to do is study the image of people using their Surface Pro 3's in the imaginary world of Surfacewood, above, then answer the questions correctly. All entrants with the correct answers will be entered into the grand prize draw.The Surface Pro 3 is built to help you get more done. Pre-loaded with Windows 8.1 Pro, you can install your favourite desktop software, including the full Microsoft Office Suite and thousands of programs created for the Windows platform. Surface Pro 3 has a 4th generation Intel Core processor, which delivers blazing-fast performance.

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