Battery Life

Surface features an integrated 31 Wh battery, which is larger than what’s in the iPad 2 but smaller than what Apple used for the iPad 3.  Charging duties are handled via a 24W power adapter with a custom magnetic connector.

Of all of the aspects of Surface, the charging connector feels like the least well executed. For starters, the connector is quite long – about twice the length of a MagSafe connector. Secondly, the magnets in the connector aren’t all that strong so the attraction to Surface isn’t very confidence inspiring. The third issue is alignment. Because of the 22-degree beveled edge on Surface, you have to approach mating the power connector to the tablet very carefully. More often than not I’d have the connector match up but not fully connect. It usually required a few minor adjustments to get the connector to actually start charging. My final complaint is about the power indicator LED on the connector itself. The LED only glows white and gives no indication of whether or not the device is done charging. Furthermore, it doesn’t even glow all that bright, making it hard to tell in daylight whether the device is even getting power. I’m pleased with virtually all aspects of Surface’s physical design, but the charging port and connector need to be redone for the next generation.

The power adapter itself is larger than the 10 – 15W units you get with most tablets in this price range, but it is also a considerably larger power supply. You can take Surface from completely empty to fully charged in a little over 3 hours hours. You can also get Surface up to 50% power, while using the device, after just over an hour of being plugged in. Microsoft wanted to prioritize real world productivity scenarios where you had a limited amount of time to charge but also needed to use the device. The larger power adapter and not gigantic battery were the right balance to meet those needs.

The power brick features a Windows RT logo, but is otherwise clean. The surface of the adapter is a nice soft touch plastic. The two prongs for US models stow away neatly in the adapter. The power cable is nice and long at around 1.5m. There’s no built in cable management other than a little U to keep the connector attached to the end of the cable.

To measure battery life I put Surface through our 2012 tablet battery life suite. All tests were run with the display calibrated to 200 nits and with Surface, its Touch Cover was attached.

Overall battery life is pretty competitive with the iPad. In lighter use cases Apple pulls ahead slightly, but if you look at our updated web browsing test the heavier CPU load pushes Surface ahead of the third gen iPad. It’s not clear how the 4th gen iPad would stack up in this comparison.

Video playback is also decent for Surface, although Apple manages to pull ahead with the win there as well. The bigger accomplishment is that we’re seeing a Windows device with battery life that’s comparable to other tablets running mobile OSes designed from the ground up.

Microsoft has the right OS platform to be competitive in this space. With some more power efficient hardware I could see a future iteration of Surface moving its way up these charts.

Camera Performance
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  • kyuu - Tuesday, October 23, 2012 - link

    Agreed, I'd like some clarification on this as well. I certainly hope it's a simple micro-HDMI that can be used with off-the-shelf adapters.
  • ervinshiznit - Tuesday, October 23, 2012 - link

    Anand,

    You mention that you would have liked to have seen the surface with x86. Is Windows RT only compatible with ARM or does it support x86 also? I realize it's just a compilation issue but I was under the impression that only ARM builds of Windows RT would ever be released by Microsoft.
  • MadMan007 - Tuesday, October 23, 2012 - link

    Don't connect the hardware branding name 'Surface' and software. You are correct that WinRT=ARM only. But there will be Microsoft Surface devices using x86 hardware running full Windows 8.

    Will there be a budget Atom-based x86 Surface, in the same form factor as this one? I'm not sure off the top of my head, but that's probably what Anand meant.
  • ervinshiznit - Tuesday, October 23, 2012 - link

    There have only been plans announced for the Surface Pro, which would include a Core i5 and run full Windows 8.

    I bring up the Windows RT=ARM only because Anand brought up the performance issue in the context of MS Office, and he said that he would have liked to see an Atom in the Surface instead of this ARM core. But then it wouldn't be able to run RT. And that would also mean no free Office 2013 since it's not included in full Windows 8
  • Ryan Smith - Tuesday, October 23, 2012 - link

    Whether or not to include Office is basically arbitrary. Microsoft could include it with Surface Pro, as it's entirely up to them..

    The point to take home is not that RT doesn't run on Atom, but rather that Office on Surface is currently unusually sluggish. A SoC with better performance in lightly threaded situations (such as the Atom) would handle Office better based on what we're seeing.
  • Kevin G - Wednesday, October 24, 2012 - link

    Reading through this review and others seems to point the problem at Office being sluggish and not necessarily the Tegra 3. Even on the PC side where far higher performing hardware exists, Office doesn't give the impression of a speed champion. I'd love to see Office compared on the Surface, Surface Pro and a decent laptop. Yeah, the deck would stacked in favor of the laptop winning but it'd be a good reference point for users as well as reviewing the idea of usability on each device. For example, I can see the utility of viewing and making a quick and simple change to an Excel spread sheet on a tablet but for heavy Excel use restricted to an on screen touch keyboard would likely result in levels of frustration that'd have me snapping the tablet in two.
  • kyuu - Thursday, October 25, 2012 - link

    That's the reason for the Touch/Type Covers...
  • ervinshiznit - Tuesday, October 23, 2012 - link

    Anand,

    You say

    Application launch times are another thing entirely. Nearly every application I launched took longer than I would’ve liked on Surface. I can’t tell if this is a hardware issue or a software optimization problem, but application launches on Surface/Windows RT clearly take more time than on an iPad. I timed a few just to put this in perspective:

    And after the : I expected a chart or something but there's nothing there.
  • JumpingJack - Tuesday, October 23, 2012 - link

    I asked the same question, Ryan said they were overwhelmed with the iPad announcement, the 8350 launch, and his... He said Anand will fill in he info a bit later.
  • michal1980 - Wednesday, October 24, 2012 - link

    apple products didn't get short changed reviews... I wonder why.

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