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Dell inspiron m501r Battery

  • fasophiafrance
  • 2017年4月17日
  • 讀畢需時 8 分鐘

The Pakuma K1 is a slight update of a design classic. Featuring a well-padded slot for laptops up to 17in, it’s comfy and practical, with two external pockets for small items and webbing at the sides. It could be bigger at the top, and it looks plain, but at this price you can’t complain.The Dart easily swallows a 16in laptop in its well-padded rear compartment, and it also has a dedicated pocket for tablets or ebook readers. It boasts a ridiculous number of interior and exterior pockets, and a rain cover is zipped into the base; irritatingly, however, it can’t be detached for drying.The ultra-stylish Saxby isn’t the biggest shoulder bag around, but it’s one of the best made. It will take laptops up to 15in, and with its padded microfibre interior, you can be sure your pride and joy will be kept safe from knocks and scrapes. Best for the Ultrabook crowd, though, since there isn’t an awful lot of room for a charger.To test this enormous bag, we stuffed a 4kg, 17in gaming laptop into its internal sleeve and lugged it home. The bag coped fine, spreading the weight well with its “third leg” stabiliser strap, and it has lots of pockets, plus a zip-up front for easy access. It’s pricey, but very stylish and practical, and comes with a 30-year guarantee.

Crumpler’s bags are always stylish and well made, plus they come with a 30-year guarantee. This minimalist shoulder bag/briefcase is a little light on protection, though, with little padding at the bottom of the bag or in the laptop sleeve. There’s plenty of room inside for chargers, but it’s basic for the money.It lacks style, but this Targus is very practical. It will take laptops up to 14in (there’s a 16in one too), and it can be used as a briefcase or shoulder bag; a stretchy section of the strap takes the weight. The laptop section has an “airbag” insert at the bottom to protect against knocks, and there’s plenty of room for extras. Excellent.Taking a dedicated laptop bag out and about isn’t always practical. But if you’re slinging it in a bag with lots of other gear, it’s still going to need protection. That’s where sleeves come in, but this one from Targus isn’t the best we’ve seen: the neoprene just doesn’t provide enough padding.The greenest laptop bag around, Pakuma’s eco 2 bag uses recycled plastic bottles for its outer casing and inner lining. It feels well made, with plenty of padding and a tough finish on the outside. Perhaps Pakuma should have used recycled metal for the zip: it broke the first time we used it.

We've seen plenty of touchscreen all-in-ones since the debut of Windows 8, but the Acer DA241HL is the first we've seen running Android. See also the 11 best tablets of 2014 It's an interesting idea, and externally it looks like a respectable system. It offers a 24in, Full HD infrared touchscreen, with sensors embedded in the gloss-black bezel to detect your fingers; below this sits a row of buttons, embedded in the centre of the silver speaker grille; and around the rear is a single leg that's used to prop the whole thing up.The single-leg arrangement means you can't adjust the height, but you can tilt the display backwards until it lies almost flat against the desk – useful if you want to put the DA241HL to use as a kitchen worktop machine, or while standing at a workbench. Tap the power button and the DA421HL boots into Android 4.2. The OS has barely been customised, so if you've used a Nexus tablet or smartphone, you'll know exactly what to expect. It's not locked down, either: you're free to install apps via Google Play.Being a desktop machine, the Asus includes a compact wireless keyboard and a mouse. However, the keyboard feels rather mushy, and the mouse isn't a natural fit for Android's touch-first interface: right-clicking, for instance, is substituted by a long press, which takes a lot of getting used to, and swiping down the notifications and quick settings areas doesn't work well. We felt more comfortable prodding, poking and swiping at the DA241HL like a giant tablet.

Other aspects of the hardware are more practical. Under a panel at the rear are three full-sized USB 2 ports, which allow the connection of hard disks and wired peripherals, and an SD card slot. At the bottom, you'll find wired Ethernet and a full-sized HDMI input, which means the DA241HL can be used as a monitor (for a laptop or games console, perhaps). The port supports MHL, so you can also mirror the screen of a smartphone or tablet via micro-USB.The quality of the Full HD display is excellent for an all-in-one this cheap: a maximum brightness of 235cd/m[sup]2[/sup] doesn't sound like much, but it's a VA panel, so contrast is a superb 2,350:1, and colours really jump off the screen. Touch detection works well – it's responsive and accurate.STOP! Put that credit card back in your wallet. If you're thinking of buying a MacBook Air now, almost half way through 2016, then you probably should stop and think. In all likelihood, Apple will be waiting for Intel's Skylake Refresh processors (slightly updated versions of the original Skylake hardware) before unleashing a new Air on the world. And given that the Air is one of the few laptops in the Apple line-up which doesn't have a Retina display – and is all the poorer for it – a little patience may reward with something very, very special indeed.

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If you have to buy something right now, then you have two options: Buy the excellent MacBook, or grab a 13-inch MacBook Pro. Both of which are on Alphr's Best Laptops of 2016 line-up, which you can check out by clicking here.The 13in MacBook Air isn’t the tour-de-force it once was. While Apple has lavished the MacBook Pro with a slew of upgrades, and endowed the dainty new 12.5in MacBook with a Force Touch trackpad and Retina display, the Air hasn’t been so lucky. In fact the only major upgrades in this year's edition are Intel’s latest Broadwell processor technology and an upgraded SSD. In every other respect, it's the same old laptop with an identical chassis and 1,440 x 900 resolution TN display.Last year’s 1.4GHz Haswell CPU has been replaced by the 1.6GHz Intel Core i5-5250U, and along with it comes a new integrated GPU, the HD Graphics 6000, and as ever it's possible to upgrade to a 2.2GHz Core i7 for a £130 premium.As I’ve found on other laptops, performance increases aren’t necessarily the order of the day here: Broadwell’s move to a 14nm process simply means the new CPUs generate a little less heat.

Apple’s decision to bring the supercharged SSD over from the 13-inch MacBook Pro is far more exciting. The previous PCI-Express SSDs weren’t exactly slow, easily outstripping the mSATA drives found in most Windows laptops, but Apple has upped the internal PCI-Express interface from two to four lanes for 2015, doubling the available bandwidth.The result is one very fast SSD. Where the previous generation achieved sequential read and write speeds of 664MB/sec and 542MB/sec, the new model stormed past with 1,145MB/sec and 979MB/sec.Apple 13-inch MacBook Air (early 2015) review: general performance and battery life Taken as a whole, however, there isn’t a huge impact to the changes. The MacBook Air sailed to a respectable score of 0.7 in the old PC Pro Real World Benchmarks – exactly the same result as last year’s model. In the new benchmark suite, it scored 36 overall, a result which puts it slap bang in-between the 13in MacBook Pro, which scored 56, and the MacBook, which managed a modest overall result of 20.Subjectively, the MacBook Air remains a spritely performer. The capable CPU and SSD make for scorching application load times, not to mention a general feeling of snappy responsiveness. Meanwhile, the low screen resolution does at least have one benefit: despite the humble GPU, OS X feels slick and smooth, and there are fewer of the slight judders you occasionally get on the Retina-class MacBook Pro models.

Battery life was always a strong point, and here the 2015 MacBook Air outstrips its predecessor by a huge six hours. In our light-use test, with the screen brightness calibrated to 75cd/m2, the MacBook Air kept trucking for 16hrs 46mins, which is around the same time the 13in Macbook Pro achieved. In a video rundown test, with Wi-Fi off and the screen set at a brighter 120cd/m2, the 13in MacBook Air played a 720p movie on loop for 11hrs 51mins.Around the edges of the chassis, there are two USB 3 ports, an SD card reader, a 3.5mm headset jack and a Thunderbolt 2 port for both ultra-fast connectivity and monitor output via mini-DisplayPort. Wireless connectivity is ample, too, with dual-band, 2x2 stream 802.11ac and Bluetooth 4 connections.Thunderbolt 2 provides a generous 20Gbits/sec of bandwidth to connected devices, and since it now also supports the DisplayPort 1.2 standard, the MacBook Air is capable of driving a 4K display at 60Hz as well as supporting the daisy-chaining of multiple displays. That’s a welcome bonus in itself, but with an increasing amount of high-end professional hardware adopting the Thunderbolt standard, its presence on the MacBook Air remains a significant plus over Windows devices.

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Apple hasn’t skimped on the basics, either. The 720p FaceTime camera isn’t especially crisp, and there is the tell-tale fizz of sensor noise, but the combination of natural colour reproduction and ample detail are good enough for video chats. The inbuilt speakers remain a cut above many laptops, too, with plenty of volume and enough clarity that you don’t need to always reach for a pair of headphones.Apple 13-inch MacBook Air (early 2015) review: connectivity and display If there's one area where the MacBook really shows its age, though, it's the 13.3in, 1,440 x 900 display. With Full HD fast becoming a de-facto standard on most mid-range Windows machines, and high-DPI displays standard fare on high-end devices, the MacBook Air’s display has never been in more dire need of a Retina upgrade.At first glance, however – and as long as there isn’t a Retina-screened MacBook Pro in the vicinity – it looks reasonably competent. Brightness peaks at a decent 313cd/m2, and contrast hits an acceptable 786:1. Apple has colour calibrated the display to the best of its abilities, too, so onscreen colours look as bold and bright as the elderly TN panel technology will allow.

Those with more exacting demands will find plenty to criticise. Sharpness is severely lacking compared to Full HD and high-DPI displays, and poor vertical viewing angles cause colour and contrast shifts as you move the screen back and forth. Nor can Apple’s factory calibration remedy the panel’s limited range of colours. The TN panel is only capable of reproducing 60% of the sRGB colour gamut, so it can't dredge up the deepest reds, blues and greens. As if to prove the point, the MacBook Air’s display achieved an average Delta E of 3.7 and a hugely wayward maximum of 13.9.There’s no doubt the MacBook Air remains a handsome laptop, but with the chassis remaining millimetre-identical over the past few years, there’s the nagging feeling that it’s beginning to look, well, ordinary.The slim, 1.33kg all-metal chassis still strikes a fine line between prettiness and toughness, but the thick silver bezels circling the display are beginning to look clunky. In truth, the new MacBook has well and truly stolen its thin-and-light thunder, and the competition has had plenty of time to catch up – the MacBook Air is well overdue a makeover.

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