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May 24, 2016

HP HSTNN-Q44C Battery

Like most Chromebooks, Acer's Chromebook 14 is only sold in one configuration. It comes with an Intel Celeron N3160 processor, 4GB of RAM and a 32GB eMMC hard drive.Like other ThinkPad Yoga laptops, including the X1 Yoga and Yoga 260, the P40 has two tight hinges that allow it to bend back a full 360 degrees, transforming it into tablet, tent or stand modes. Lenovo's laptop also features a Lift n' Lock keyboard, which keeps the keys from depressing when the system is not in clamshell mode.

At 13.30 x 9.3 x 0.78 inches and 3.96 pounds, the ThinkPad P40 Yoga isn't the most svelte 14-inch convertible on the market, but it's noticeably lighter than 15-inch clamshell workstations. The HP ZBook Studio G3 (0.71 inches thick) and the Dell Precision 5510 (0.66 inches thick) both weigh 4.6 pounds but are a little thinner. However, Lenovo's own 14-inch ThinkPad X1 Carbon (0.66 inches thick) tips the scales at just 2.8 pounds. The 15-inch HP Spectre x360, which is also a bend-back 2-in-1, is just 0.2 pounds heavier than the P40, despite its larger display. Like most ThinkPads, the P40 Yoga is designed to take a punch, figuratively speaking, and keep on standing. According to Lenovo, the laptop has passed MIL-SPEC 810G durability tests for extreme temperatures, shocks, vibrations and humidity.

The company also says that all of its ThinkPad models endure an 8-corner drop test, an LCD stress test and a lid/open close test that occurs 30,000 times.The ThinkPad P40 Yoga comes standard with the Intel vPro manageability and TPM encryption, two features that many corporate IT departments require. It also has a swipe fingerprint reader for biometric logins.The ThinkPad P40 Yoga's spill-resistant keyboard provides a really comfortable typing experience, even if the feedback isn't as good as on the ThinkPad P50. With 1.8mm of vertical travel, the keys are deeper than those on the X1 Yoga (1.7), the HP ZBook Studio (1.5) and the Dell Precision 5510 (1.3).

Using the P40 to take the 10fastfingers typing test, I achieved a strong score of 101 words-per-minute with a 0 percent error rate, far above my typical 96 wpm, 2 percent performance. The keyboard's backlight was more than bright enough at both low and high settings.Like almost every other ThinkPad, the P40 Yoga has a TrackPoint pointing stick between its G and H keys. As always, I found the stick extremely accurate and appreciated being able to navigate around the desktop, without lifting my hands off the home row.If you don't like the little red nub, you'll appreciate the P40 Yoga's 3.5 x 2.1-inch touchpad. Whether I was clicking on an icon, drawing figure eights in Windows Paint or highlighting text in Google Docs, the buttonless pad provided precise movements, without a hint of jerkiness. Multi-touch gestures such as pinch-to-zoom and three-finger swipe worked flawlessly.

Like other recent ThinkPads, including the Yoga 260, the P40 Yoga includes a stylus. Called the ThinkPad Pen Pro, this 4.5-inch long pen allows you to sketch on the screen with 2,048 levels of pressure. At less than an ounce, the stylus certainly felt light in my hand, but pressing the tip against the hard display for writing felt a bit slippery. I had a more paper-like experience with the same pen on the Yoga 260 and with the thicker stylus on Microsoft's Surface tablets.

Despite a little slickness, I was able to draw effortlessly in Windows Paint, to highlight just the text I wanted on a web page and to handwrite with ease. Lenovo includes its WRITEit app, which allows you to handwrite directly into any text area in any application and have those scribbles turn into ASCII characters.

Because of my poor handwriting, I found it easier to write into large fields like the canvas in WordPad, rather than small sections like the Windows 10 search box or the Chrome browser address bar. However, no matter where I wrote, WRITEit did a pretty decent job of recognizing my chicken scratch. I also enjoyed using WRITEit's canvas feature, which let me take screen shots and scribble notes or put highlights on top of them.

Unlike many other devices that come with pens, the P40 Yoga includes a built-in bay for storing and charging the stylus. Lenovo claims that putting the pen into the bay for just 20 seconds provides 19 hours of juice and, in my tests, I never had a problem with its battery life.The ThinkPad P40 Yoga's 14-inch, 2560 x 1440 touch screen provides sharp images with accurate colors, though the panel's glossy surface makes it highly reflective at wider viewing angles. When I watched a 1080p trailer for Rogue One, fine details such as the freckles on Jyn Erso's face or the ridges on a star destroyer were prominent. Blacks, like the darkness of space, were deep, while bright shades such as the green in the battle room lights or the orange in an X-Wing Pilot's jumpsuit were true to life, though not overly rich.

At a glance, the Zenbook UX305UA looks a lot like its thinner cousin. It has the same overall, simple design language, with predominate use of metal bound together by some plastics components, such as the display hinge and bezels. Speaking of the bezels, theyâ€™re again on the thick side, which gives the Zenbook an old-school look.

On close inspection, the differences between the older UX305CA and the new UX305UA are obvious. The latter system is just over a tenth of an inch thicker and, importantly, is not as aggressively tapered, which means it feels thicker than the on-paper gap suggests. Weight has increased, too, with the new UX305UA ballooning up to 3.2 pounds. Thatâ€™s about a half-pound more than a Dell XPS 13 (without touchscreen) and about eight-tenths of a pound heavier than the UX305CA.
Still, despite its recent weight gain, the Zenbook retains its usual strengths and weaknesses. Its matte silver metal exterior is elegant, though not eye-catching, and holds up well to use. The chassis feels durable, without a hint of flex in any body panel. Some will find the design too generic, while others will enjoy its simplicity. Personally, we tend towards the former, though thereâ€™s no denying Dellâ€™s XPS 13 makes the UX305UA â€“ and most ultrabooks, for that matter â€“ look out of date.
While we loved the laptopâ€™s look and general build quality, we did notice a slight bend in the chassis. It wasnâ€™t visible, but apparent because the system always sat ever-so-slightly off level when placed on a table. This is a common potential defect (any metal chassis will bend), and would normally make a notebook eligible for return. We are not holding this against the systemâ€™s score, but felt the flaw should be noted.
Weâ€™ve seen this keyboard before
The design of the UX305UA is derivative of its thinner cousin, but the keyboard and touchpad are a rip-off. Itâ€™s impossible to say theyâ€™re the same without ripping both systems apart, but they look and feel identical.

Thankfully, thatâ€™s a compliment. The keyboard is excellent for a 13-inch ultrabook, with a spacious layout, full-sized keys, and no oddities to trip up our muscle memory. Key travel is excellent and keys bottom out with a responsive, satisfying action, which makes touch typing a cinch.
Like its cousin, the UX305UA does not have a keyboard backlight. Thatâ€™s a more significant flaw here than it was with the thinner Zenbook, as the UX305UA is more expensive and competes directly with mid-range ultrabooks, almost all of which have backlit keyboard.

You may forget that problem, though, once you start using the touchpad. Itâ€™s spacious, responsiveness, and easily handles Windows 10 multi-touch gestures. It doesnâ€™t feel as smooth as a MacBook, but itâ€™s close, and itâ€™s certainly better than average among systems in its price range. It may even beat the XPS 13, which has excellent touchpad feel, but a smaller touchpad surface.
A beautiful, non-gloss display

The display is another component the UX305UA seems to share with the thinner UX305CA. Itâ€™s once again a 1080p non-gloss panel without touch functionality, and once again achieves average scores in our benchmarks.
We found the screen can product 95 percent of the sRGB color gamut, and 71 percent of the AdobRGB gamut. These numbers are middling. They easily beat alternatives like the LG Gram 14, but come in a bit behind Dellâ€™s XPS 13, which hit 97 percent of sRGB and 73 percent of AdobeRGB.

Contrast fares better. We measured a maximum ratio of 820:1 at maximum brightness. That beats the Dell XPS 13â€™s ratio of 680:1, and nearly matches the more expensive Razer Blade Stealth, which produced a ratio of 840:1.
Other areas fall behind, however. Gamma is the best example. We measured a curve of 2.4, which is off the ideal of 2.2. In practice, this reading means the UX305UAâ€™s display looks noticeably darker than it should. Images sometimes lack shadow detail, and the images that should appear vibrant look colder and less inviting than they should.
On balance, though, the UX305UA does well compared to other mid-range ultrabooks. Your jaw will remain firmly in place, but the scenes display with respectable color accuracy, and excellent sharpness. The use of a non-gloss display helps tremendously in bright rooms, too. Nothing short of full sunlight will reduce the screenâ€™s readability.

The Intel Core i5-6200U equipped by the Zenbook UX305CA comes with Intel HD Graphics 520. This is the most common of the current Intel HD incarnations, but quite far from the most powerful. Still, can it handle basic games?
The 3DMark Fire Strike score of 821 more than doubles the thinner UX305CA, which once again shows this new, thicker model has its perks. However, the score essentially ties other Core i5-6200U notebooks. Youâ€™ll find no advantage over other ultrabooks here. We also fired up Counter-Strike: GO and Heroes of the Storm at 1080p resolution. Both games were playable if detail was set to low. Counter-Strike was even smooth, as it averaged a decent 73 frames per second. Heroes of the Storm averaged a choppier 45 FPS, and the most intense bursts of actions dropped the framerate below 30 FPS. Both games dipped below 20 FPS when detail was kicked up to maximum.
Big battery, good battery life

Plumping up this Zenbook isnâ€™t just needed to stuff in quicker hardware. Asus has also crammed in a bigger battery. While the thin Zenbook UX305CA has a 45 watt-hour unit, the UX305UA has a 54 watt-hour battery. This is very close to the Dell XPS 13, which has a 56 watt-hour battery.
The question, of course, is if that will offset the new Core i5 processorâ€™s higher power draw.
Asus-Zenbook-UX305UA-Battery
And the answer? Not quite. Our Peacekeeper web browsing benchmark loop sucked the battery dry in about five and a half hours, while the the UX305CA lasted almost six hours. Still, we think the trade-off between performance and portability is a good compromise. As shown earlier, the new model is substantially quicker than its thinner cousin.
The Zenbook also compares well against its rivals. While the Dell XPS 13 lasted much longer, the Razer Blade Stealth and Lenovo ThinkPad 13 â€“ both with smaller batteries â€“ canâ€™t touch the UX305UA.
And buyers should note that our Peacekeeper loop is demanding. Our more mundane web browsing test, which is not as strenuous, extended the UX305UAâ€™s battery life to almost nine hours. A full charge should last most users an entire workday.