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.

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  • tipoo - Tuesday, October 23, 2012 - link

    AFAIK they built it ground up in their existing hardware division.
  • shompa - Wednesday, October 24, 2012 - link

    The rumour is that Steve Jobs ghost work at MSFT.

    Press, that are "Apple" nerds have been to MSFT labs and looked at their stuff. They have amazing laptops, computers and other stuff that they would buy direct. And these are people who are fanatical about beautiful design, liberal arts and that stuff should work.

    The sad thing for MSFT is all the politics. They have great products in their labs and cant release them because it makes OEM angry. Surface is for example a compromise. The 600 dollar price is ONLY because of OEM. MSFT cant price Surface aggressive since OEM would stop building RT stuff.

    And that is a huge threat to Windows. Surface was rumoured to cost 199 dollars. HP/Dell and other OEMs have started to look for alternative to windows (Unified Android). Valve have ported steam to Linux(and later Android).

    That is probably the feature.
    MSFT continues with their new integrated approach. Same as Apple.
    OEMs will start to use "open"/fragmented Linux/Android.
  • kyuu - Thursday, October 25, 2012 - link

    Except not, since the only OEM who can make a profit on Android is Samsung.
  • Stas - Monday, November 5, 2012 - link

    You're delusional, if you think an open source platform can become dominant in the computer market.
  • ol1bit - Tuesday, October 23, 2012 - link

    One word describes Microsoft and all their ideas.... LATE.

    They had a good lead in the smartphone arena and gave up. They couldn't see what the next big thing was going to be. iPhone took off, then Goggle really jumped on Android, pushed changes at a blistering pace. Microsoft lost the phone race...So go keep Nokia alive and try to catch up, doubt they will.

    Tablet are the same way. Market already lost. A gazillion apps for both iPad and Android Tablets.

    Everything MS does is 2 steps behind. I know they hope to catch up, but I have 3 Android devices, and Love it. All my apps carry from device to device as it should. Goggle keeps pumping out great enhancements, same with Apple.

    Oh well.
  • sunflowerfly - Tuesday, October 23, 2012 - link

    "Tablet are the same way. Market already lost. A gazillion apps for both iPad and Android Tablets."

    Actually Android has very few tablet apps. I believe Microsoft will take over and become the number 2 tablet within a year. Google is giving away tablets at cost because the public is not buying them (not that a few million sold to geeks is a bad gig).
  • PubFiction - Wednesday, October 24, 2012 - link

    people said the same thing about netbooks when they were all launching with linux, what you forget is that yes MS is late but they have won even though they were late to many parties. Vertical integration and supply chain control are huge factors. To most people office cost $100 and any of these devices shipping with free office means it is $100 cheaper. Now you get vertical integration, MS is going to leverage office to muscle into the tablet space, and what is so nice is that rather than just sit on office / windows and let that win the game they are actually going a little above and beyond by bringing the surface keyboard to the market and bringing out what is mostly a high quality well built device.
  • DukeN - Wednesday, October 24, 2012 - link

    How the fuck is Microsoft late wrt to ideas?

    Microsoft had a tablet OS out about 10 years ago, couldn't execute it with their partners so it languished.

    Maybe they can't execute but they definitely aren't LATE.
  • xSauronx - Tuesday, October 23, 2012 - link

    Last year work gave us all ipad2 32gb units as part of the christmas bonus. i dont love ios, and prefer android for a phone and tablet, but i understand why people like it, and it was definitely a great tablet. sold it for an android, however.

    id love to get one of these this year...i'd be very interested in trying one out for a week. hopefully there will be apps a plenty for this, or at least a good ecosystem for the full windows 8 tablets in the future. i could see me moving away from android for this...maybe
  • OVerLoRDI - Tuesday, October 23, 2012 - link

    I really am impressed with this offering from MS. As a long time PC user and one who types a lot, tablets were absolutely out of the question for me, typing on glass has and always will be a fail.

    That being said, I don't love it enough to pony up that much money.

    I'm also curious to see how Win8 works on smartphones, it seems like it could be a great OS.

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