Battery Life

Like our performance tests, our battery test borrows more from our tablet reviews than it does our notebook reviews. The inability to run any native software here limits us to... well, to the browser. So, we start with our web browsing test. The idea is straightforward, we’re cycling through four websites, disabling any background services that might interrupt the process and setting the display to our customary 200 nits. This test is designed to challenge ARM cores, giving them just enough time to render a page and go back to sleep before asking for the next page. This isn’t as challenging for Ivy Bridge silicon, which is able to complete the render and rush to sleep much faster, which we know can yield better average power consumption and better battery life. The other factor that affects battery life in this scenario is that display. With over 4 million pixels to light up, the panel is going to chew through power a lot faster than something less dense. Only one way to found out how it goes, though. 
 

Web Browsing Battery Life

The Pixel ends up eking out 6.5 hours on WiFi, besting the Surface Pro by a bit, but it’s much more a wash, the larger battery’s added capacity is exhausted by the more power hungry screen. On LTE the Pixel puts up 4.08 hours of stamina; enough for a few hours at a cafe, but not an all day untethered session. 
 
Our video test loops a 720p video encoded with H.264 with an average bit rate of 4 Mbps with the screen once again set at our traditional 200 nits. Running this test on a Chromebook is a little different than any other platform. The video player does exist somewhat outside the browser, but the software is written in HTML5. Hardware accelerated decode of H.264 content is a staple of Chrome and HTML5, though. Right?

Video Playback - H.264 720p High Profile (4Mbps)

 
This is really awful, and surprising performance. The best explanation we can muster is that an issue in the video player is preventing this file from utilizing hardware decode resources. In that case, decoding and then scaling the video to match the display might tax the system enough to cause this sort of poor performance. If that's the case then an update could drastically impove this score; until then, though, the Pixel does not make for a good media companion on the road. 
 
Ultimately, what we’re really seeing in these charts, is that the rush to sleep advantage Ivy Bridge has over ARM is not enough to overcome ARM’s power envelope. The Pixel’s silicon is a 17W part. Even the most power hungry ARM SoCs in this table clock in below 5W. That’s a deficit that’s going to be hard to overcome... for now. There’s a very real reason to suggest caution in buying anything with Ivy Bridge right now, Anand made the same case in his Surface Pro review. A Haswell alternative in the future should exhibit better battery life, with equivalent performance. There’s also the Atom refresh (Silvermont) to consider; a quad-core Baytrail part could provide plenty of performance while drawing a lot less power than the Ivy Bridge part we’re using today. 
 
Is the Pixel going to let you sit in the park all day, working on the great American novel? No, it won’t. Heck, it might not get you through a longish movie during a flight. If untethered stamina is a prime concern, look elsewhere than really any of the Chromebooks. If you’re near an outlet most of the time, this performance just isn’t great. When you design a thin, modern notebook, you have to make compromises, and in this case, battery life was one of them.
Performance Conclusion
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  • Crono - Friday, May 31, 2013 - link

    I don't mind when reviews talk about design aspects or aesthetics. But the focus on the subjective seems out of place on AnandTech. It's not a bad review overall, and I don't want to sound too negative (I appreciate the effort it takes to write reviews), but when we start to factor in whether a piece of hardware or a computer is a "status symbol" or not into review, I think we're in danger of losing sight of the tangible, quantifiable elements of computing and well-built machines.
  • themossie - Saturday, June 1, 2013 - link

    "Status" is the only way to judge this computer - that and a premium (albeit minimalist) experience.

    Judging the Chromebook Pixel from a purely technical standpoint would be silly - it's not based on offering superior value for money or superior functionality. There is no direct economic justification to buy this computer.

    But some will buy it anyways. It's all about 'feel' - the OS as much as the physical machine itself. If a consumer can live with the pure web functionality, you get a bulletproof OS with a gorgeous screen and case - for a pricetag which can only be justified by "status" and a luxury experience.

    For the right person, this could be the ultimate minimalist laptop.

    I'm sure Google doesn't expect this to be a high-volume product; if they did, they would have cut the price significantly. Instead, they were looking for a truly premium halo product to - a nice looking piece of kit which puts Chrome OS out there as something other than a cheap, crappy modernized netbook.
  • SomeNiceGuy - Friday, May 31, 2013 - link

    It would be nice to know the latency and the accuracy of the touch screen. iOS devices excel at this, others don't. Even if you haven't measured it, do you experience the touch screen laggy compared to an ipad? I think this can make or brake a touch centric device.
  • mfenn - Friday, May 31, 2013 - link

    "Once revealed, the grey slab is irresistible. It wins you over before it does anything but sit there. The exposed hinges are masked by a silver barrel that runs the width of the device. The aluminum is cold to the touch, and the only flourish is the LED strip lower down the lid, dormant, but nonetheless exciting for its potential. It’s lighter than you expect when you lift it, and feels solid; not simply in the sense of its rigidity, it feels like a block of aluminum weighing just north of 3 pounds. Right angles abound but are softened with chamfered edges making it comfortable to hold and touch. Its meager thickness is uniform across its length, and the weight is similarly balanced, avoiding the rearward bias of other notebooks. Almost without thought I find myself torquing and flexing against the device; my hands struggling to elicit a single creak or bend from the frame. Setting it down and lifting the lid, it boots in a breath, and reveals an image so rich with detail I’m drawn closer to get a better look. Chromebook or not, the Pixel is a status symbol. And I want it."

    Is Engadget or Anandtech?
  • neo_1221 - Friday, May 31, 2013 - link

    "50 shades of Chrome"
  • themossie - Saturday, June 1, 2013 - link

    Made my day!
  • lmcd - Friday, May 31, 2013 - link

    Chrome is great, but...

    The biggest problem is Java. There haven't been efforts to put Java on Chrome. Android, ironically (and expectedly), is holding Chrome OS back. Hopefully efforts are made to replicate Android's provided resources with Dart or C++, then bindings added for Java.

    Google is currently its own devil. Dalvik needs to become an extension to PNaCl, or needs to move towards it. If Google doesn't have a hidden repository where they're pushing to this (regardless of their short-term plans and their visible work) they are risking their whole web business model.
  • wffurr - Wednesday, June 5, 2013 - link

    Are you talking about Java applets? Aren't those dead by now?

    Or do you mean running Java desktop apps like Eclipse? There are no desktop apps on Chrome OS except Chrome.
  • bji - Friday, May 31, 2013 - link

    The review had alot of good detail but too much superfluous chatter. I think you need to work on understanding when brevity is more appropriate than verbosity. You'd do better to use the florid language as a highlight where needed instead of being present in nearly every sentence in the article. Just sayin' ...
  • bji - Friday, May 31, 2013 - link

    Forgot to mention - the review should be more objective and less subjective as well. This is a tech review site, and I think the numerous comments about how enamored the reviewer is over subjective qualities of the laptop are out of place.

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