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  • Acer Aspire 7220 Battery all-laptopbattery.com

    Cloud backup is fine, but it also has several inherent weaknesses. Should an attacker be able to compromise a backup account it is easy enough to wipe out all the backups, or even more if you happen to live in the Apple centric eco-system with remote wipe capability. With the advent of cryptolocker ransomware the issue of good backups becomes even more critical.Maybe seven years is too long to expect software updates to a TV set – but I'm pretty sure that we shouldn't be seeing key apps vanishing from devices within two years, either. And at the very least, I think it's about time that certification schemes or subscription services make clear their commitment to updates.For instance, could Freeview make it a condition of certification that a manufacturer commits to maintaining not just the main set firmware, but the smart services increasingly built in too? Couldn't services like Amazon and Netflix show 'Guaranteed compatible until...' next to each device on their sign up pages?

    Should the likes of Freeview mandate support periods, or withhold certification? It might be a bit of a minefield for manufacturers, especially where there's a reliance on third parties like Google and so on. But if Panasonic, Sony, and everyone else had said “We won't include YouTube in our TV unless you guarantee the API will carry on working for five years, because otherwise we can't get certification for the UK,” would the plug have been pulled quite so quickly?As consumers, it seems to me, there's not a lot we can do individually. You might be able to claim a set hasn't been “reasonably durable” in court, but it's not going to be easy to set a precedent. If consumer electronics manufacturers are going to use smart services as one of the selling points of their kit, then they need to be prepared to back those up, and make sure that the service providers are holding up their end of the bargain.Much as consumer entertainment makers may like to wash their hands of this, and say “we're powerless,” I don't think they really are. As far as the punters are concerned, it's the CE companies that have let them down. Those companies need to stand up to Google and Amazon, and point out the damage to their brands caused by early removal of online services. It's not good enough to put a YouTube logo on the box, and then walk away.

    Back when smart TVs appeared, some of the people pushing them seemed to have fond ideas that they, not traditional broadcasters, would become a new sort of gatekeeper. They'd not only make money selling us a TV, but by doing deals with people who wanted to their apps and channels to appear on the TV home screen. It was never going to work, not least because none of them really seemed to put their heart into anything beyond the whizzy press launch.So here's an idea for the big consumer electronics companies. Quit with the Smart TV nonsense, and just support casting from tablets and phones. Or perhaps not even that; I'd be happy if my AV receiver included something like Miracast and allowed that to be output via the HDMI port.If you can't give a guarantee of a reasonable duration of support for fancy services built in to a TV, then you should stop including them, as they're no more than a box ticking exercise for the marketing department. Just make a damn good screen, and leave the rest to us. The second issue is that as some have found that cloud backup services promise to protect a user and their data, and tend to wither when accosted by the G-men. Why bother with the expense and complexity of hacking/stealing a user’s laptop if there is a backup copy in the cloud.To counter both scenarios I have a backup routine that isn’t particularly complex but it works for my needs. Firstly, I use SpiderOak for continuous backup of daily work stuff. I control the crypto phrases as a key tenet of SpiderOak’s philosophy if they can’t recover, or reset your password, nor read your files.

    This still isn’t enough for me. All that SpiderOak get is a Truecrypt file. This means that should they have to hand over my files (or they are stolen) the perpetrator has to get through two layers of strong encryption. It means that even if SpiderOak doesn’t live up to its promises I have Truecrypt to fall back on.Next, I have an offline weekly backup. I have a regular routine to backup my data to removable hard drives. The external hard drives are also heavily encrypted with Truecrypt. Someone feeling the need to look at my drives won’t get very far. All this means I have several generations of backup both online and offline so I am pretty well insulated against provider data loss, ransomware or just third-party incompetence.In these modern times everyone needs to be careful with passwords. Re-use of passwords can cause a world of hurt. All too often we see that some e-commerce vendor has been compromised. If you re-used the same password, it’s going to be an issue you have to sort out real quick.Also “auto saving” of passwords is also a big mistake. It may well be unpopular but it means that critical passwords aren’t stored on the local device. Password re-use is a potential issue but preventing saving passwords helps ensure security.

    In light of the LastPass hack I advocate either using tools such as PassEto, which rather than record information uses a strong but simply implemented crypto system and a unique password for each site.For other things I do keep them in an Excel spreadsheet. That may sound bad but it is placed in an encrypted container that is only decrypted when needed and then the Truecrypt volume is unmounted.The browser is a user’s route into the internet. It is also the route scumware takes to infect PCs and networks. I tend to have one browser for known trusted work related sites (although this isn’t infallible by any means, given that high profile sites can be infected by drive by infections).I have a virtualised Windows 7 machine that I can roll back once I have finished browsing for anything other than the sites I trust explicitly.Without revisiting what has been said many times previously, disabling Java and avoiding plugins as well as sensible defaults goes a long way to preventing browser-related infection. It should go without saying that the browser and OS should be kept up to date with security patches.

    Being a bit of a paranoid type I also have two machines. One for business and another for personal use. At the end of the day, it’s about keeping work and home separate. The last thing you want is for your business files to be pilfered or your contacts harvested because you fancied a bit of something interesting and visited the wrong site.These are just the steps I take to prevent any damaging data loss incidents or compromise.Some aspects of security are beyond our control, while the strength of what you can deploy is governed by (almost literally) the law. In this piece I’ve also skirted over the obvious, like not downloading random .exes, crack files while making educated use of firewalls and antivirus software.Also, bear in mind that the number of steps a user or an admin can take before the measures they take become exceptionally disruptive, expensive or both.A former games company executive, who allegedly tried to steal trade secrets from his old bosses and flee to China, has been arrested and charged by the FBI.

    The US Department of Justice (DoJ) claims Jing Zeng, formerly the director of global infrastructure at Machine Zone, stole confidential information from the games maker, and was set to board a China-bound flight. He was cuffed last week at San Francisco International Airport.Zeng was charged Tuesday with felony theft of trade secrets, a crime carrying maximum penalties of 10 years in prison and a $250,000 fine.Based out of Palo Alto, California, Machine Zone's lone product to date is Game of War: Fire Age. The massively multiplayer online (MMO) strategy game boasts of millions of players worldwide using its Android and iOS apps – but it is perhaps best known for its borderline NSFW web adverts featuring busty supermodel Kate Upton.According to the FBI affidavit [PDF], Zeng worked at Machine Zone from March of 2014 to July of this year, when a failed transfer attempt left him without a position in the company.Toward the end of his tenure and after his termination, the FBI alleges, a disgruntled Zeng downloaded confidential information relating to Game of War's in-app payments system. Among that data was the Tableau database, a collection of strategic data on how players interacted with the game and where they spent money.

    Though Zeng had wiped his company laptop, the FBI said he kept Machine Zone's confidential data on three USB drives that were not wiped and, allegedly, were being held by Zeng in hopes of getting a severance agreement signed with Machine Zone. He was arrested while preparing to board his flight and charged with theft of trade secrets.The DoJ said the 42 year-old Zeng has been released on bail, but has been placed on electronic monitoring pending the criminal hearing. Leicestershire – slap-bang in the middle of rural England – has leapfrogged London as the UK’s electronic device-theft capital, according to a comparison of police force stats.A series of FoI (Freedom of Information) requests by ViaSat showed 51 per cent of thefts in Leicestershire were of electronic devices, compared with 27 per cent in London and 19 per cent nationwide.The stats covered reports of the theft of devices such as computers, smartphones and tablets that could store sensitive personal information. Electronic kit accounted for 31 per cent of thefts reported to West Midlands Police.Similar research from last year revealed that London was the undisputed champion of device thefts by number and proportion. ViaSat concludes that other areas of the country outside London are no longer the safe havens they once seemed.

    “Whether a corporate smartphone, a personal tablet, or your bank manager’s laptop, there is a huge amount of information stored on electronic devices that can compromise our privacy,” said Chris McIntosh, chief exec of ViaSat UK.“The simple fact is that, for many thieves, the most tempting target isn’t necessarily the device itself, but what it contains," he added. "From access to your bank records, to blackmail, to flat-out identity theft, a lost or stolen device can still damage its owner long after it’s stolen."Combined data from the Metropolitan and City of London police forces showed that thefts of electronic devices had fallen 37 per cent from the number reported last year to the Metropolitan Police alone.Nationwide, there was a 34 per cent fall. This coincided with a drop in the number of thefts in total, which fell by 20 per cent in London and 24 per cent nationwide.McIntosh cautioned: “Two years’ worth of data isn’t yet enough to begin drawing conclusions that our streets are getting safer.”

  • Acer Aspire 5742zg Battery all-laptopbattery.com

    That large screen is the obvious stand-out feature, and its 1600x900 resolution also provides greater clarity and brightness than the 1366x768 of most low-cost laptops. It’s not quite full-HD (1920x1080) but it works well for streaming video and browsing your photo library, and there’s a DVD drive for bingeing on box-sets too.The Satellite C70D is a new model, and arrived with Windows 10 pre-installed, and it even includes a special button on the keyboard to activate the Cortana digital assistant. It was also one of the few laptops we’ve seen recently to use an AMD processor – the quad-core A8-7410, which runs at 2.2GHz (with a boost option taking it to 2.5GHz).We were curious to see how AMD would compete against its many Intel-based rivals, but the A8 processor only managed modest performance, with scores of 1699 and 1917 in the Home and Work suites of PCMark 8. Like the Asus and the Lenovo, it manages a casual gaming frame rate in the mid-teens which is still useable but not exactly the smoothest experience.

    Still, it does also include 8GB of RAM to help when working with multiple apps or large file sizes, and 1TB of storage, so it can handle most routine tasks reasonably well. The Satellite C70D weighs 2.6kg, so battery life isn’t a crucial selling point, but it can manage four hours of streaming video, which will let you get in a few episodes of Game of Thrones between charges. The rider, one “Oxtox” took to the forums of Road Bike Review with a tale in which he spotted “a Google self-driving Lexus”.Oxtox says “near the end of my ride today... we both stopped at an intersection with 4-way stop signs.” The rider was aboard a fixed-gear bike. Such steeds, commonly known as “fixies”, have no freewheel so when the pedals are moving, the wheels are moving. Cyclists whose shoes bond to their pedals with cleats often prefer not to detach when stationary so use a technique called a “track stand” whereby they stand on the pedals, turn the front wheel and balance without moving.

    Track stands are tricky to sustain: riders often wobble, rock and move a centimetre or five as they fight to stay keep their feet off the ground.Oxtox says the Googlemobile “apparently detected my presence … and stayed stationary for several seconds.” He then started his track stand, thinking the car would go through the intersection. “It finally began to proceed, but as it did, I rolled forward an inch while still standing. The car immediately stopped.”“I continued to stand, it continued to stay stopped. Then as it began to move again, I had to rock the bike to maintain balance. It stopped abruptly.”This sequence of events continued “for about two full minutes and the car never made it past the middle of the intersection,” Oxtox wrote, adding that “The two guys inside were laughing and punching stuff into a laptop, I guess trying to modify some code to 'teach' the car something about how to deal with the situation.”Google told The Washington Post it welcomes the incident as it will help it to improve its robo-cars' perfomance.Track stands are so-named because they're very useful during track cycling sprint races, when it can be advantageous to let an opponent past. Of late, they're more often practiced by those who ride fixed-gear bicycles, many of whom are accused of being slaves to cycling fashion.

    Breaking Fad Online video content is becoming increasingly popular, thanks to the likes of iPlayer, Netflix and Amazon. For many of us, those services make it possible to find something to watch whenever we want. With Netflix and Amazon throwing huge amounts of money at their own original productions, it's likely that more and more people will be considering a subscription a worthwhile addition to their monthly expenses.TV dinosaurs are coming about in just a few years thanks to being smart, once upon a time Savvy readers of El Reg will probably be using an external box like a Roku, a Chromecast, or a Fire TV stick to grab the content they want to watch, but there are a lot of people who do use the smarts in their 'Smart TV' or devices like BluRay players. Those built-in apps will become, with increasing use, almost as important a part of people's viewing as the main channels, or their old VCR.Yes, I know what you're going to say – they should know better. But let's face it, they don't. Even after Google's pulled the plug on a load of kit, people still expect that when they buy a TV with these things built in, they'll last a reasonable time.

    The smart TVs for which Google dropped support were made in 2012 and earlier. Clearly not one to be outdone, Amazon's gone one better, and is dropping support for its video app on some 2013 products – so, you could have an LG BluRay player that's less than two years old that won't work after 14 September.Tough luck if you were hoping to use it to watch Clarkson and co. when they return next year.Amazon has sent an email notification to owners of 2012/2013 LG BluRay players, plus 2011 Samsung TV and BluRays. There isn't a definitive list of affected models on the website, though its PR team tells me no other brands and years are affected.Looking at the list of supported devices, there are now no Samsung TVs or BluRays from before 2012, and no LG BluRay players listed at all. It's not all bad news, though. Rather than just leave people dangling, like Google did with its YouTube withdrawal, Amazon knows it's going to make money out of its video customers. As a consequence, the emails included a 50 per cent discount on FireTV, taking the price down to a very attractive £39.The offers are being sent to those who have an affected device registered with their Amazon Instant Video account. Would it be awfully wrong of me to suggest that if you do have a smart device with Amazon Video built in, like a TV or BluRay, you should register it ASAP, to make sure you get any discount offers applicable? Think of it as a £39 tax rebate.

    Amazon's offering 50 per cent off a Fire TV to people affected by the loss of Instant Video on other devices It's unlikely, of course, that this will be the last such service withdrawal. As various sites and TV stations overhaul their online offerings, we're likely to see more older kit fall by the wayside. Sometimes, that will be for sound technical reasons – like a codec change, which requires new hardware – but all too often, it's going to be laziness, inertia and a complete disregard for consumers.Makers of TVs and similar equipment throw their kit out of the door, and typically you'll be lucky to get a couple of updates in the first year, if that. My own TV set is one of the first generation VieraCast Panasonics; it never got iPlayer, and no longer has YouTube. I should be grateful, I suppose, that there were a couple of updates to its firmware, but these days it's really just used as a dumb monitor, and everything I need comes from either an old Roku 2XS or a Chromecast, via the AV amp.

    Mind you, that Roku is from late 2011; it's never had the new version of Netflix with user profiles, but it still works. Hopefully, that will remain the case for some time.In May of this year, Roku stopped providing channel and software updates for its first generation players, but owners of those can still watch Netflix. The oldest models date from 2008.First generation VieraCast sets fell victim to Google's API and Panasonic's uninterest Of course, technology marches on, as Reg readers know all too well. Sometimes, it's hard to carry on supporting older devices, especially if there's limited funding available, as in the case of the BBC. But Google's not short of cash, and nor is Amazon. I reckon either could find a way to support the necessary APIs for some of this older kit. Is a Roku box from 2008 really so much more advanced than a 2013 LG BluRay?I believe it's becoming increasingly important for vendors to give some indication of support timeframes, wherever possible. No one expects that a TV set with only a DVB-T tuner will suddenly get an upgrade to T2; that's impossible. But when it comes to software, we really should be expecting better from the vendors of much of our consumer electronics kit.

    I'm still using an early 2008 MacBook Pro – the model before the Unibody was released. Admittedly, there are a few apps I can no longer run on it, but that's not because of the hardware. It's because I've still not updated to the latest Mac OS.If I wanted to, it would be completely free. Seven years life isn't bad for a laptop, and it cost about the same as a high end TV set at the time. Why is it reasonable to have free updates on one, but none at all on the other?In a post-Snowden world most IT people are painfully aware that most of us would not win a fight against a well-funded organisation, or government, that wants the data on your network, laptop or device.When someone is targeted by such an entity, they won’t go for the ever-popular “spooks” style secret bugging or custom zero-day exploits. Those tricks are reserved for the real bad boys (and other governments, if you live in the US).A user can use all the encryption they like, but the UK government’s strongest weapon is a potential two-year jail term for those who don’t roll over and comply with decryption key requests. In less enlightened nations spanner decryption may well be used to persuade a suspect to hand over those crypto keys.

    With that thought in mind how can administrators and power users secure a company network against data loss as well as the common or garden variety thief, attacker or malware slinger?A lot of individuals and companies view the theft or loss of laptops and mobile devices as a big issue. Such theft represents two distinct issues.Once control of the device is lost the security already present on the device is the only thing preventing an attacker from lifting all the information. At the recent SpiceWorld London a straw poll suggested that approximately two thirds of attendees used Full Disk Encryption. The other one third must be either lazy or just mad.

    Any device I own or manage for others uses Full Disk Encryption (FDE), often overlooked is making a device auto lock and password protected. In such a lose configuration, once a device is lost or stolen they will more than likely be in control of a Facebook, LinkedIn or some other account.Just make sure it is password protected OK! Fingerprint scanning? Just don’t trust it. Anything that can be defeated by a gummi bear is not worthy of being called secure.When working as a junior admin many years ago, before InfoSec became a big security issue, we had a laptop theft due to a salesman not being careful with his company laptop. One day we noticed the stolen laptop come online on our remote management product. With the remote viewing capability we decided to just watch.Somehow this stolen computer had ended up being purchased (or otherwise obtained) by a student at a London university (according to the IP geolocation data). We knew it was a student because rather than wipe the laptop and start over, a new account was added and Ti graphing and MattLab software installed.

    We even watched him do his coursework on it. When the police were contacted it was an exercise in futility. We gave up when we tried to explain IP addresses to a copper who was neither interested nor IT literate.Eventually this “user” clocked the software and removed it post-haste. Luckily, there was no real sensitive info on the machine. Lesson well and truly learned: most laptops that are stolen are by opportunistic thieves.There really is no excuse. Most modern devices and operating systems come with the option to enable inbuilt FDE. Assuming the inbuilt security algorithm is robust is the only thing a user can really do.Make sure that the encryption phrase used is strong and lengthy. I typically run to thirty characters including the whole range of non-alphanumeric ones.The loss of the information on the device can be either an inconvenience or a disaster depending upon how good the backups are. Secure backups can be a complex issue in themselves.

  • Akku DELL Vostro 3360 akkus-laptop.com

    Einen Zweitakku für Smartphone, Tablet oder Notebook dabei zu haben, ist abseits von Steckdosen äußerst hilfreich. Doch ein Geräteakku ist nicht universell einsetzbar und muss meist im Gerät geladen werden, was zu umständlicher Wechselei führt. Und was, wenn der Akku fest im Gerät verbaut ist und sich gar nicht auswechseln lässt? In diesen Fällen ist ein Akkupack sinnvoll. Es wird mit Steckdosenstrom oder Sonnenenergie aufgeladen und kann per USB-Anschluss geräteübergreifend eingesetzt werden.
    Akkupacks - auch Powerpacks, Powerbars oder Powerbanks genannt - sind kaum größer als ein Smartphone oder eine externe Festplatte. Die meisten Modelle wiegen zwischen 200 und 500 Gramm und können so als Notreserve in Jackentasche oder Rucksack mitgenommen werden.
    Kai-Christian Möller vom Fraunhofer-Institut für Chemische Technologie in München stellt fest, dass handelsübliche Akkupacks um die 30 Euro eine Leistung von 13000 Milliamperestunden (mAh) bringen. „Das reicht, um ein Mobiltelefon etwa sechs- bis neunmal aufzuladen“, sagt er. „Für einen Laptop dagegen nur einmal.“
    Möller, der eine Projektgruppe für elektrochemische Speicher leitet, empfiehlt, vor dem Kauf die Angaben der Batteriekapazität der Akkus zu vergleichen. So findet man heraus, ob ein Akkupack genügend Strom für das aufzuladende Gerät liefert. „Herkömmliche Handyakkus benötigen 500 bis 1000 Milliampere (mA), bis sie voll aufgeladen sind“, so Möller. Smartphones saugen meist etwas mehr.

    Die Eins-zu-eins-Rechnung geht allerdings nicht immer auf. Lutz Labs von der Zeitschrift „c't“ rät, beim Akku immer ein bisschen mehr Batteriekapazität zu wählen, als man eigentlich benötigt. „Man muss etwa 20 Prozent Ladeverlust einrechnen“, erklärt er. Labs hat Akkupacks getestet und herausgefunden, dass manche mehr versprechen als sie halten. „Bei chinesischen No-Name-Produkten kam es vor, dass mehr Leistung angegeben worden ist, als tatsächlich drin war.“
    Nachdem der Akkupack an der Steckdose aufgeladen worden ist, steht er bereit für den mobilen Einsatz. „Die meisten Akkupacks besitzen einen USB-Ausgang mit einer Spannung von fünf Volt“, weiß Labs. Geladen wird entweder über das gewohnte Lade- oder über ein Adapterkabel. „Der Akku im Mobiltelefon und der im mobilen Ladegerät sollten aufeinander abgestimmt sein“, rät Gustav Vaupel, Professor für Leistungselektronik an der Hochschule für Angewandte Wissenschaften (HAW) in Hamburg. „Hier ist es wichtig, auf gleiche Spannungsverhältnisse beziehungsweise Voltangaben zu achten.“

    Doch für wen sind die aufladbaren Batteriepakete eigentlich gedacht? „Akkupacks sind ideal für Leute, die draußen ein bis zwei Wochen unterwegs sind“, sagt Kai-Christian Möller. Beim Wandern, Zelten oder auf einer Radtour könnten sich die Geräte als sehr nützlich erweisen. Das bestätigt auch Lutz Labs: „Vor allem wenn man GPS nutzt, kann der Akku schnell leer sein“, sagt er. Sinnvoll können die Packs auch für Urlauber sein, die MP3-Player oder Tablet im Gepäck haben.
    Ganz unabhängig von Steckdosenstrom machen Akkupacks natürlich nicht - mit sogenannten Solarladern, die Sonnenlicht in Energie umwandeln, schon eher. „Die Geräte besitzen entweder einen eingebauten Akku, der die Sonnenenergie aus den Solarzellen speichert“, erkärt Prof. Vaupel, „oder nur ein Solarpanel.“ Im ersten Fall wird der in elektrische Energie umgewandelte Sonnenschein im Akku zwischengespeichert, im zweiten direkt an ein Gerät weitergegeben.

    Auf den ersten Blick scheinen Solar-Akkupacks die perfekte Stromlösung für unterwegs, bei genauerem Hinschauen offenbaren sie aber ihre Schattenseite. „Ein Solarlader in Handygröße braucht 16 bis 25 Stunden, um ein Handy aufzuladen“, sagt Kai-Christian Möller. Und um genügend Energievorräte für das spätere Laden eines mobilen Gerätes zwischenzuspeichern, bräuchte man eine große Solarpanel-Folie. „Die kostet mehrere hundert Euro und ist viel schwerer als ein Akkupack“, gibt der Experte zu bedenken.
    Hinzu kommt, dass die Geräte nur bei direkter Sonneneinstrahlung ausreichend Energie erzeugen, sagt Möller. „Bei bewölktem Himmel reicht das Sonnenlicht nicht aus, um den Akku zu laden - egal, wie groß das Solarpanel ist.“ Das bestätigt auch Prof. Vaupel. „Die Hersteller gehen bei ihren Leistungsangaben von Optimalverhältnissen aus“, erklärt der Forscher. Hierzulande werde die oft vorausgesetzte Sonneneinstrahlung von 1000 Watt pro Quadratmeter meist gar nicht erreicht.
    Über das Laden von Akkus gibt es viele Weisheiten und Tipps. Nicht alles trifft jedoch auch auf die heutigen Akku-Generationen noch zu. Andere Tricks sollten Sie auf jeden Fall beachten. FOCUS Online erklärt, wie Sie Ihren Akku wirklich pflegen.
    Wenn der Smartphone-Akku leer ist, fühlen sich Viele wie ein halber Mensch. Tipps und Tricks, was dem Akku schadet und gut tut, gibt es zuhauf – doch nicht alle sind heute noch richtig.

    Ein standhafter Mythos besagt, dass Smartphones oder Laptops immer sofort nach dem Aufladen vom Stecker gezogen werden müssen. Das stimmt nicht: Die meisten Geräte merken selbst, wenn sie aufgeladen sind. Sie können den Akku also auch über Nacht laden. Wer auf Nummer sicher gehen möchte, kann beim Laptop den Akku herausnehmen, wenn er im Netzbetrieb läuft: So wird auch Überhitzung vermieden. Das ultimative WLAN-Handbuch 2015. So richten Sie ein komplettes, multimediales Heimnetzwerk, binden Tablets/Smartphones ein und boosten die Geschwindigkeit. Mit dem Sonderheft von und FOCUS Online kommen Sie im digitalen Zeitalter richtig an. Ein anderer Irrtum ist, dass Akkus komplett entleert werden sollten, bevor man sie erneut an den Strom steckt. Sonst drohe, die Leistung der Akkus abzunehmen. Dies war beispielsweise bei alten Nickel-Cadmium-Akkus der Fall, heutige Lithium-Ionen-Akkus muss man nicht leerlaufen lassen. Bei ihnen ist vollständiges Entladen sogar schädlich.
    Statt sich also von diesen Mythen leiten zu lassen, sollten Sie lieber darauf achten, dass ihr Akku nicht zu warm wird und nicht dauerhaft nahezu voll geladen ist. Stattdessen ist eine ständige Ladung zwischen 30 und 70 Prozent für Lithium-Ionen-Akkus optimal.
    Geräte mit Lithium-Ionen-Akkus wie beispielsweise Smartphones und Laptops sollen künftig nicht in Frachträumen von Flugzeugen zugelassen sein. Der Grund: Brandgefahr. Viele Nutzer sind nun verunsichert. FOCUS Online erklärt die Gefahr und wie Sie richtig mit Ihren Geräten umgehen.Der Beschluss der Internationale Zivilluftfahrtorganisation (ICAO) in Zukunft keine Lithium-Ionen-Akkus mehr in Frachträumen von Flugzeugen zuzulassen sorgt für allgemeine Verunsicherung. Verbraucher fragen sich: Wie gefährlich sind Lithium-Ionen-Akkus wirklich? Kann mein Handy auch einfach so außerhalb eines Flugzeuges explodieren? FOCUS Online beantwortet Ihnen diese Fragen.

    Zuerst einmal gilt: Keine Panik! Richtig ist, dass sich fragliche Akkus überhitzen können. Das bedeutet, dass sie heiß werden, aber nicht dass sie explodieren. Laut Stephan Hartmann aus dem -Testlabor haben Marken-Akkus von allen bekannten Herstellern einen eingebauten Sicherheitsmechanismus. Sie sind mit einer Sollbruchstelle versehen, die bei Überhitzung den Druck aus dem Akku leitet. Selbst bei Überhitzung können die Akkus deswegen gar nicht explodieren, sondern blähen sich höchstens auf. Sie sind dann zwar nicht mehr funktionstüchtig aber stellen keine Gefahr dar. Vorsicht ist bei Billigprodukten aus Asien geboten. Diese haben meist keine Sicherheitsmechanismen und können sich im schlechtesten Fall tatsächlich entzünden. Laut -Experten Hartmann müssen Sie sich um Ihren Laptop-Lithium-Akku keine Sorgen machen. Wenn Sie reisen und der Akku herausnehmbar ist, sollten Sie dies allerdings tun. Hier einige weitere Tipps zur richtigen Lagerung ihres Akkus:



    Wenn Sie einen Lithium-Ionen-Akku lange nicht benutzen, sollten Sie ihn kühl und trocken lagern. Laptop-Akkus am besten in eine Tüte in den Kühlschrank. Diese Maßnahmen stellen sicher, dass die Haltbarkeit des Akkus nicht nachlässt.
    Im aktiven Gebrauch sollten Sie darauf achten, dass Sie Ihr Smartphone nicht direkt in die heiße Sonne legen oder anderen Hitzequellen ausliefern.
    Vorsicht auch beim Laden des Gerätes. Dabei erhitzt sich der Akku. Zwar besteht keine Explosionsgefahr, doch liegt das Handy dabei beispielsweise unter einem Kissen, kann es zu Hitzestau und Brandentwicklung kommen. Dies zeigte zum Beispiel ein Fall in New York:Lange angekündigt, endlich da: Die Broadwell-Architektur von Intel wird in erste Notebooks verbaut. Die neuen Prozessoren in 14-Nanometer-Fertigung ersetzen die Haswell-Modelle und bringen dem Nutzer mehr Leistung bei sparsamerem Verbrauch. Wir haben uns den ersten Schub an Broadwell-Notebooks ins Testlabor geholt und die neue Architektur auf den Prüfstand geschickt.

    Die Preisspanne der Geräte reicht von 470 bis 1.100 Euro und das Modellangebot vom preiswerten 15,6-Zoll Office-Laptop bis zum schicken und kompakten Ultrabook mit SSD und hellem Display–unser Testsieger Asus ZenBook UX303LA fällt in diese Kategorie. Im Testfeld befinden sich einige Spezialisten, wie das Acer Aspire R13 oder das Lenovo Yoga 3 14, die sich durch ihre Schwenkdisplays in Tablets verwandeln lassen.
    Das Asus ZenBook UX305FA ist auch ein Sonderfall. Sein 13,3-Zoll-Display hat eine satte Auflösung von 3.200 x 1.800 Pixel – fast dreimal so viele Punkte wie bei den Konkurrenten mit Standarddisplay (1.920 x 1.080 Pixel). Die getesteten Notebooks werden zwar noch mit Windows 8.1 ausgeliefert, doch sie sind für ein kostenfreies Upgrade auf Windows 10 berechtigt und laufen damit einwandfrei.

    Ein direkter Leistungsvergleich zwischen Broadwell- und Haswell-s ist nicht ganz einfach, da in den Notebooks neben CPUs und GPUs noch viele weitere Faktoren für die Performance verantwortlich sind. Unsere Benchmark-Messungen im Testlabor legen jedoch nahe, dass die Broadwell-Modelle bei Nutzung beider Kerne im Schnitt um die 10 bis 15 Prozent leistungsfähiger als ihre Vorgänger sind. Für die Grafiks liegt das Plus im besten Fall sogar bei rund 20 Prozent. Das Leistungsspektrum unter den Broadwell-Modellen selbst ist natürlich auch weitgefächert. So erreicht unser Testsieger mit einem starkem Core i7-5500U (2,4 GHz) beim PCMark7-Testprogramm ganze 5.173 Punkte, während das Dell XPS 13 mit Core i5- 5200U (2,2 GHz) auf lediglich 4.691 Punkte kommt.

    Für die Performance ist ein anderes Ausstattungsdetail viel wichtiger geworden – nämlich, ob das Notebook eine Festplatte (HDD) oder einen Flash-Speicher (SSD) eingebaut hat. So kommt das von der sonstigen Ausstattung mit dem Testsieger vergleichbare Toshiba Satellite L50-B-2G2 nur auf 2.836 Punkte – schuld daran ist nur die 1-TByte fassende Magnetfestplatte. Im Vergleich kosten SSDs doch noch mehr und somit haben fast alle Broadwell-Notebooks unter 800 Euro nur eine langsame HDD. Das günstigste Modell mit SSD ist der Preistipp Acer Aspire V3, das für knapp 730 Euro einen FlashSpeicher mitbringt. Mit 240 GByte ist der sogar vergleichsweise üppig bemessen. Selbst in teuren Modellen, wie dem Dell XPS 13 (ca. 1.100 Euro) oder Lenovos Yoga 3 14 (ca.1.000 Euro) werden nur 128-GB-SSDs eingebaut, womit man unter Windows schnell an die Grenzen stößt.