Battery Life

By Ultrabook standards, the 47.5 Wh battery capacity in the Surface Laptop 2 is on the light side, as some of the competition can offer 60 Wh or so. But Microsoft tends to focus quite a bit on power usage instead of raw capacity, and as a result can eke out extra battery life through other means. The battery is only slightly larger than the 45 Wh in the Surface Pro 6, and it performed well in our battery rundown tests.

To test the battery life, we calibrate displays to 200 nits to make the test as even as possible, and then run through several workloads.

2013 Light

Battery Life 2013 - Light

Our lightest test is our oldest, which cycles four webpages per minute. The scripting isn’t a very big task for modern processors. Despite the smaller battery, the Surface Laptop 2 lasted for over 11.5 hours, which is fantastic.

2016 Web

Battery Life 2016 - Web

Our web test involves a lot more work for the CPU, and as such the results are generally quite a bit lower than our older light test, and that is the case here again with the Surface Laptop losing over an hour of runtime compared to the light test, but it still came in well above any other laptop we’ve tested, offering over 10.5 hours of runtime.

Movie Playback

Battery Life Movie Playback

Media playback allows the CPU to offload work to fixed function hardware in the media block, which allows most of the processor to go to sleep. The Surface Laptop was able to play back a local movie file for over 15 hours, which is amazing considering the battery capacity here.

Battery Life Tesseract

Our Tesseract score puts the movie playback into a more usable number. The runtime is divided by the length of a long movie (The Avengers) to get a result in terms of how many movies you can watch in a row. The Surface Laptop 2 is ready for any movie marathon you’re after.

Normalized Results

Battery Life 2013 - Light Normalized

Battery Life 2016 - Web - Normalized

By removing the battery capacity from the equation, we can take a look at the efficiency of each device. The Surface Laptop 2 outperforms all other laptops we’ve tested here. Microsoft has put a tremendous amount of effort in the getting power consumption in check across their lineup, and the lower display density of the Surface Laptop 2 puts it at the top of their devices, as well as the top of any laptop we’ve tested. It is a truly impressive result.

Charge Time

Microsoft ships the Surface Laptop 2 with a 44 Watt power supply, and in typical Surface fashion it offers an incredibly useful USB charging port built into the brick. The charger connects via the Surface Connect port, which is the same proprietary magnetic connector Microsoft has been using since the introduction of the Surface Pro 3. It’s a great connector, it’s easy to connect, and it offers a light on the side so you know whether or not it’s charging or not. The only thing missing is it would be nice to have the USB-C port for charging as well, which would make travel even easier.

Battery Charge Time

The Surface Laptop 2 isn’t particularity quick at charging, but it’s within a few minutes of the other Surface devices. Microsoft doesn’t seem to want to charge the battery too quickly, which may help with longevity, but thanks to the efforts they’ve put into the battery consumption, they likely don’t need to put as much weight on charging.

Display Analysis Wireless, Audio, Thermals, and Software
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  • Manch - Monday, April 1, 2019 - link

    True no need to fanasize. Just look at Anands bench. Intel has 2 8 series 6C/8T. One cost 100$ more and has a 100mhz base clock bump over the 2k series Zen. Boost clock is also higher. They trade blows but the 2k series zen wins more than it loses. Then look at the 8086 which is double the price and for double the price it beats the 2k series Zen. Fair enough. Looking at the benchmarks, the key gake away is as I said earlier, Intel has the speed still and its enoigh to offset the efficiency gains of Zen's SMT. Unless Intel is holding back soemthing good, the 3rd series Zen will take the Rchitecture from trading blows and winning some to handing out L's.
  • eddman - Thursday, March 28, 2019 - link

    What do you mean by "effective"?
  • mr_tawan - Thursday, March 28, 2019 - link

    In the other hand, if I wait for half a year and found that the CPU I bought is not much better comparing to the ones available 6 months before, I'd be very disappointed.

    That is something happened to me before.

    That said, I don't think this will be the case for Ice Lake CPUs.
  • tipoo - Thursday, March 28, 2019 - link

    Hopefully that's what they were waiting on for a redesign with USB C/TB3
  • maus92 - Thursday, March 28, 2019 - link

    I replaced a MacBook with this machine. The MacOS was having issues with backups and reliable / persistent internal network connections, so this purchase is an experiment. So far, so good. My only complaint is the trackpad - the one on the MacBook was far superior.
  • Eletriarnation - Thursday, March 28, 2019 - link

    A bit of a nitpick, but I think this statement in the first page isn't 100% correct:
    "...16 GB, which happens to be the maximum supported by Intel’s current U-series processors."
    This limitation probably only applies to DDR3, as ark.intel.com advertises a maximum of 32GB and DDR4 support for these models too.
  • Ryan Smith - Thursday, March 28, 2019 - link

    To be clear, that passage is solely talking about LPDDR3. Which is why it's mentioned as such in the full sentence.

    "models ship with a minimum of 8 GB of LPDDR3, with high-end and upgraded models increasing that to 16 GB, which happens to be the maximum supported by Intel’s current U-series processors."
  • Gunbuster - Thursday, March 28, 2019 - link

    FIFY: "The Surface Laptop 2 is built out of glue"

    Should mention nothing is serviceable so you better buy the extended and accidental damage warranty and plan on that "accident" when the battery degrades to 60% in true surface style.
  • Irata - Thursday, March 28, 2019 - link

    Small correction:

    The article says "Model Tested: Core i7-8650U 8GB 256GB $1299", however further down under pricing, you see:
    "256 GB Intel Core i7 with 8GB of RAM: $1599"
  • Ryan Smith - Thursday, March 28, 2019 - link

    D'oh. Fixed. Thanks!

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