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June 23, 2016

Acer Aspire 7741G Battery

Home: The PCMark 8 Home benchmark includes workloads that reflect common tasks for a typical home userâ€¦ Home includes workloads for web browsing, writing, gaming, photo editing, and video chat.Work: The PCMark 8 Work benchmark test measures your systemâ€™s ability to perform basic office work tasks, such as writing documents, browsing websites, creating spreadsheets and using video chat.While thereâ€™s some overlap between each category, each creates a distinct score. PCMark 8 offers the option to run benchmarks in an OpenCL-accelerated mode or to use a standard, CPU-only mode. We opted for the accelerated option, partly to test how OpenCL support in Intelâ€™s HD 520 GPU would compare against Nvidiaâ€™s GTX 960M. While the 960M is vastly more powerful than Intelâ€™s graphics in 3D gaming, 2D workloads donâ€™t tend to scale the same way.

In the three PCMark 8 tests, the Razer Blade Stealth actually narrowly leads the Alienware R13 in two of our three benchmarks, though the gap is fairly small. Intelâ€™s OpenCL performance is pretty good for desktop applications these days, and the Core i7 6500U is performing well in both systems.For our storage performance tests, weâ€™re comparing the storage suites from PCMark 7 and PCMark 8. Both benchmarks use real-world application traces to measure performance as opposed to synthetic applications and in theory, Razerâ€™s PCI Express storage should give it an advantage here, but we donâ€™t see that advantage reflected in either test.

PCMark-StoragePCMark 7 and 8 donâ€™t use the same storage performance test, but we suspect the difference between the two isnâ€™t just a matter of which tests were run. Futuremarkâ€™s storage score isnâ€™t just a summary of the various individual tests â€” the company weights the scores to determine an overall performance level. The weighting in PCMark 8 is different from PCMark 7, and that probably accounts for some of the difference we see here.

The other potential variable is the storage solution itself. The Razer Blade Stealth uses a Samsung MZVLV256HCHP chip. You can view its characteristics here, but to make a long story short, the driveâ€™s sequential read performance is rated at 1GB/s while its sequential write performance is listed as just 280MB/s. Random reads are listed at 250K IOPS, while random writes are 74K IOPS. The weak write performance may be what pulls the Razer down in these results, though weâ€™d like to note that we observed no practical difference between the Blade Stealth and the Alienware 13 in our various tests.Our final test is x264 encoding using version 5.01 of the x264 benchmark. Again, we should see very similar test scores here â€” both the Alienware and the Razer use the same CPU, and this test is entirely CPU-bound.The Alienware 13 and Razer Blade Stealth are neck-and-neck in this test; the Core i7-6500U clearly isnâ€™t throttling to any significant degree in either system. The Razer leads narrowly on the first pass, while Alienware ekes out a small win in the second.

Battery life
One place where the Razer Blade Stealth has been knocked somewhat is the battery life, which hasnâ€™t been particularly great compared with other ultrabooks. Since weâ€™re a bit lacking in comparable ultrabooks, we canâ€™t compare strictly against those platforms, but we did compare both platforms in the Creative suite of PCMark 8.

Bear in mind that this is the most strenuous of the PCMark 8 suites and that it produces total run times lower than what youâ€™d see in a battery test that focused only on idle or video playback. Overall battery life for Razer is pretty close to a midrange gaming laptop with a GTX 960. The 1440p panel on our Razer display is likely part of the reason why battery life was close to the bulkier Alienware; weâ€™ve long known that ultra high-definition panels had a significant impact on system battery life.

We say "initial verdictâ€ instead of final verdict, because this is only the beginning of our notebook comparisons, and weâ€™re planning to review both the Alienware 13, the Alienware-specific external graphics card solution, and Razerâ€™s external Core graphics dock. Still, the early data here is positive. Thereâ€™s absolutely no doubt that the Alienware R13 would demolish the Razer in any kind of head-to-head gaming test, but as far as ultrabook workloads are concerned, the Razer holds its own.

Itâ€™s impressive to look at where ultrabooks are now compared with 2012, when Intel first launched the concept. While itâ€™s true that ultrabooks have failed to halt the general decline of the PC market, ultrabooks in 2016 are capable of far more than their 2012 counterparts, with higher resolution displays, better battery life, lower TDPs, and attractive enclosures. Even in 2012, buying an ultrabook often meant sacrificing overall system performance in the name of better battery life. Now, systems like the Razer Blade Stealth are proving that you can match larger laptop general performance without compromising the system at all.

Of course part of the attractiveness of the Razer Blade Stealth is the Razer Core, and weâ€™re not ready to deliver a final verdict on the system until weâ€™ve seen both components in action. But the early ultrabook positioning is solid and well delivered, even if weâ€™d like to see a bit stronger battery life.

Choosing the best headphones for your children is important because using the wrong headphones could permanently damage kidsâ€™ hearing. Don't worry though, we've tested the best headphones for kids and some we wouldn't recommend to parents. Read on for essential kids headphones buying advice.
Headphones for kids are essential tech kit for parents as (1) none of us want to hear Spongebob for more than 10 minutes or be subjected to either blam-blam action gaming or the high-pitched whine of Alvin the Chipmonk, and (2) maybe we can listen to something else while the kids are amused on the computer, tablet, phone or TV.

Another good reason for investing in child-specific headphones is for use on long-haul flights. Getting your child to watch a couple of movies during a boring flight is a big bonus for parents. The trouble is that airline-supplied headphones arenâ€™t designed for small heads and so often slip off. These kids headphones shouldnâ€™t do that.
But putting adult headphones on to your childrenâ€™s head could endanger their hearing.
You should also consider fit, comfort and design, but also limit the amount of time a child uses headphones whatever the volume.

The maximum noise level recommended by many auditory health organizations is 85 decibels (dB), and to get our recommendation a childâ€™s set of headphones shouldnâ€™t, we believe, go any louder than that. Adult headphones usually peak at 115 decibels (equivalent to a loud train), and experts warn that you could experience severe hearing loss after just 15 minutes of listening every day.
Experts also suggest that the time spent listening to headphones should be limited to two hours a day (for children and adults), even if the volume is limited at 85dB.
Also read: How to stop earphone cables getting tangled or twisted
Weâ€™ve rounded up the best kids headphones (and some that donâ€™t make the grade) and tested them on a bunch of children and some discerning parents.
What we are looking for in a great set of kids headphones is an effective volume limiter to protect those sensitive ears, a good, comfortable fit for smaller heads, minimum noise leakage (the sound that others can hear outside of the headphones), and some kid-friendly fun in the design.

Donâ€™t buy earbuds or any in-ear model for children â€“ as the closer the sound source is to the delicate working of the inner ear, the more damage loud sound can do.
And just because your chosen headphones are volume limited, don't let children wear them for hours on end. Even at 85dB prolonged headphone usage is not recommended.
Always remember that corded headphones pose a strangulation risk to young children, and as such most warn against under threes wearing them unsupervised. One solution is wireless headphones, although these cost more and require regular battery charging. If you can afford it, Bluetooth kids headphones are well worth consideration.
Best headphones for kids 2016
Griffin KaZoo MyPhones

Griffin's KaZoo MyPhones are available in several fun animal designs: a frog and a penguin for the over-ear headphones, and now monkey and even SpongeBob.
I was worried that my seven-year-old daughter would find these too kiddy but she loved the design. (Update she's still wearing them aged nine!) Older kids would probably prefer something a bit less childish â€“ like the company's Crayola MyPhones.
The KaZoo MyPhones have built-in volume-limiting circuitry that keeps the sound pressure down to levels recommended as safe for young ears. The always-on sound-control circuit caps peak volume levels at 85 decibels â€“ the maximum level recommended by many auditory health organizations.
The headphones fit a childâ€™s head (ages 3+) well, and are comfortable with generous round-the-ear padding. Expanded to maximum they would still fit an average 10-12 yearâ€™s old head.
They also feel pretty robust, which is another important feature in anything you hand over to a child!

The padding isnâ€™t just for comfort. It helps reduce noise leakage so only the child hears whatever it is theyâ€™re listening to.
The cord is 1.2m long, which is slightly longer than average for headphones. The KaZoo headphones are certainly kid-friendly with their fun animal designs. The kids we tested these on were delighted with the little touch where the headphone jack is shaped for fun, too. The penguin set has a jack shaped like a fish, and the frog has a tadpole jack. Griffin doesn't have a UK online store, but you can find these on Amazon and other online stores for under £15, which is a bargain for a quality product that also protects your child's sensitive hearing.

While many kids headphones are quite plastic-y the Puro Sound Labs BT2200 headphones look more like a high-end adult audio product, and the cost reflects this, too.
At £99 buying the Puro BT 2200 is a big step up from most of the £15-£30 headphones listed here.
You donâ€™t get just a more stylish, less kiddy look. The audio quality of these headphones is also noticeably higher, even using Bluetooth.
Thatâ€™s right, the Puro BT2200 are wireless, too â€“ which is great if youâ€™ve had too many cables damaged by a child yanking them around, or youâ€™re worried about the cable wrapping round a small neck.
Volume is limited to 85dBA, and we found that this was more than sufficient. DSP-based volume limiting means that the electronics actively monitor volume levels, with the limiter kicking in only when the sound reaches 85dBA.
These headphones go further than just limiting the volume. They also block background noise, attenuating 82 percent of sound at 1kHz. This reduces the need to turn them up to a dangerous level even when in a noisy environment such as an airplane.
The comfortable ear cushions also help block outside noise. The ear cups and head band are made of durable aluminium, while the ear cushion and band cover are leather. There are two colour models: White/Silver, and Gold/Tan.
Using Bluetooth means that these headphones need to be charged, and the "up to 18 hoursâ€ of battery life should be enough for most journeys. If the battery does run out thereâ€™s a detachable cable included. Volume controls are situated on the left ear piece. The Puro Sound Labs BT2200 headphones certainly cost more than most kids headphones but the higher audio quality, build and wireless function make them serious contenders as our favourites.

The Groov-e Kidz DJ Style Headphones look good, feel robust, come in a variety of colours and are some of the cheapest on test in this round up. They are smaller than adult headphones so fit a childâ€™s head better, but they do expand for larger skulls.
They have comfortable padded ear pads, which block most noise leakage. Cord length is 1.2m.
So far so good but hereâ€™s the bad news: thereâ€™s no volume limiter so children are free to wreck their hearing on full volume. If you can trust your kids to keep the volume low, then these are a good choice but you should be warned that they can go very, very loud (113dB) so you are taking a real risk with your kidsâ€™ future hearing.
The Groov-e Kidz DJ Style Headphones are available Red/Black, Pink/White, Violet/White and Blue/Black.
Launched last year this ultra-thin computer was by far the best looking laptop money could buy.

But this beauty came with a price as, to make it so sleek, Apple had to ditch all the connectivity ports replacing them with a single USB-C port.With the lack of ports came criticism about its lack of power compared to Appleâ€™s similarly priced MacBook Pro.Now this head-turning MacBook is back and, although thereâ€™s still no USB, Apple has squeezed bigger brains and more power inside this insanely thin computer.So, do these upgrades now make the MacBook the ultimate laptop? Express.co.uk finds out.