Charging, Battery Life & Dock Power

Both the W510 and its optional dock feature integrated 27Wh batteries. As a result, with the dock attached you can expect a near doubling in battery life. It’s not an outright doubling because the dock itself obviously draws some power.

With the dock attached Windows 8 recognizes both batteries and displays individual charge details in desktop mode:


Battery 1 is the W510 tablet, Battery 2 is the dock

The lock screen displays the combined charge percentage across both batteries to keep things simple.

Similar to how things worked with ASUS’ Transformer series under Android, the dock is used to charge the tablet’s battery. Only once the dock’s charge is depleted will the W510’s internal battery start to drain, at which point it will power both the tablet and the dock.

As is the norm with most modern tablets, the W510 introduces Acer’s own proprietary power connector. The connector itself is reminiscent of similar connectors from Apple (prior to Lightning), ASUS and Samsung. Both the tablet and the optional dock feature a power input so you can charge the system regardless of whether or not it’s docked. The same power connector is used to connect the tablet and dock so it functions for both power and data delivery.

Acer bundles an 18W power adapter with the W510. The power adapter itself isn’t anything remarkable, however Acer did use a nifty removable plug that easily twists on/off. The W510 only ships with the plug for whatever region you purchased it in so I’m not sure how useful this feature is, but it’s nice to see design innovation from Acer here.

Charge time on the W510 is pretty reasonable for a 10-inch tablet. I clocked in a full charge from 0% with the tablet off at 3.632 hours. Peak power draw during the charge was 16.74W at the wall.

Note that this is just how long it takes to charge the W510 itself. The dock contains another 27Wh battery which should roughly double charge time.

Intel’s Atom Z2760 inside the W510 is passively cooled, but under load the upper right corner of the tablet can get fairly warm. I measured a max surface temperature of 38.2C under a heavy CPU load.

Battery Life

We've started running our new smartphone web browsing battery life test on tablets as well. If you missed its introduction in our iPhone 5 review, here's a bit about the new test:

We regularly load web pages at a fixed interval until the battery dies (all displays are calibrated to 200 nits as always). The differences between this test and our previous one boil down to the amount of network activity and CPU load.

On the network side, we've done a lot more to prevent aggressive browser caching of our web pages. Some caching is important otherwise you end up with a baseband/WiFi test, but it's clear what we had previously wasn't working. Brian made sure that despite the increased network load, the baseband/WiFi still have the opportunity to enter their idle states during the course of the benchmark.

We also increased CPU workload along two vectors: we decreased pause time between web page loads and we shifted to full desktop web pages, some of which are very js heavy. The end result is a CPU usage profile that mimics constant, heavy usage beyond just web browsing. Everything you do on your device ends up causing CPU usage peaks - opening applications, navigating around the OS and of course using apps themselves. Our 5th generation web browsing battery life test should map well to more types of mobile usage, not just idle content consumption of data from web pages.

AnandTech Tablet Bench 2013 - Web Browsing Battery Life

With only a 27Wh battery, the W510 delivers our shortest runtime in our new test thus far. Normalizing for battery capacity however and the W510 looks quite competitive. Note the huge advantage that Samsung's Clover Trail tablet enjoys here however. I suspect there's something more than just a smaller battery holding the W510 back. Running the same test with the dock attached increases battery life by 86%.

Our video playback test remains unchanged from previous tablet reviews. Here I'm playing a 4Mbps H.264 High Profile 720p rip I made of the Harry Potter 8 Blu-ray. The full movie plays through and is looped until the battery dies. Once again, the displays are calibrated to 200 nits:

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

Video playback battery life is a similar story. Equipped with a fairly small battery for its screen size, the W510 weighs in at just under 9 hours of continuous playback. Samsung's 30Wh Clover Trail based ATIV Smart PC does much better by comparison.

 

WiFi & Camera Performance Reflecting on Windows 8
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  • strangis - Thursday, December 20, 2012 - link

    "Which means nothing, as these mobile chips are too underpowered to actually run the desktop x86 applications"

    My ATIV 500 painting an 11x17 300dpi multilayer image in Sketchbook Pro with the active digitizer smoothly disagrees with your assumption.

    Just saying.
    Reply
  • Wolfpup - Thursday, January 03, 2013 - link

    Of COURSE they run desktop programs. They run Firefox, OpenOffice (and older versions of MS Office you might already own), media tools, IM clients, all SORTS of things that aren't available or even possible on other platforms.

    No, it won't reasonably run Skyrim, but there's a ton that it will run.

    Personally I think this is pretty awesome...you get a good for the form factor CPU that oh yeah, happens to actually be compatible with what you have, and the price is the same as ARM stuff.

    What's bad is the GPU...seems like they have almost a 2009 smartphone GPU in there rather than something more appropriate for 2013...and then there's the issue that metro is locked down, not a real PC...but then that's why you want an x86 tablet to begin with...at least you get the real desktop and in that mode it's a real PC.
    Reply
  • jeffkro - Thursday, December 20, 2012 - link

    Basically for tablets and phones I prefer the android "library" so intel/windows really isn't for me anyways. Reply
  • SM123456 - Wednesday, February 13, 2013 - link

    Yes, but Microsoft has to use a x86 CPU if they are to be able run Windows apps.

    Basically this device and all other Windows 8 tablets under $600 are grossly overpriced netbooks with touch added and a keyboard taken away.

    The $199 Acer C7 Chromebook with its 1.1 GHz dual core Celeron processor is at least twice as fast as this thing.
    Reply
  • Dribble - Thursday, December 20, 2012 - link

    So we have windows RT that is optimised both around the ARM cpu's and tablets. There is no old software - everything that you can get for it should both run fine on tegra 3 and work well with a small touch screen. This means stuff should just work well - this is what apple do so well, and MS are trying to emulate.

    On the other hand there is full windows. Now the reason to get this not RT is backwards compatibility. Most *old* windows apps require higher performance cpu's (e.g core i3) a big screen, a mouse and a keyboard. They don't use touch at all.

    Taking that into account an atom tablet has a screen that's too small, a cpu that's too slow and a bad mouse/keyboard experience - sure you could plug both in but then it's not really a tablet any longer is it? Also all that backward compatibility support uses effectively a different ui - it's not a clean and polished single interface. Stuff won't just work well - the experience won't be as good.

    Hence if you want full windows you'd be much better off with a laptop/ultra book - they are still touch screen so you get any touch benefits but they have much faster cpu's, better keyboard, etc.
    Reply
  • Shadowmaster625 - Thursday, December 20, 2012 - link

    Not sure where you got that idea from. 99% of windows applications dont hardly use any cpu at all. Check task manager sometime. You will notice that most processes only consume a few seconds of cpu time per hour of system idle time. It is extremely rare for a windows application to peg even one cpu core to 100%. Reply
  • freedom4556 - Thursday, December 20, 2012 - link

    You that that's a percentage and it depends on what CPU you're looking at right? That's like saying, "Yeah, I never need more than 1% of my horsepower even doing 150mph uphill in a headwind." when you drive a Lamborghini. Try it again in a Honda and you'll not even be able to do it, nevermind 100% usage.

    Do you have an i7 or an Atom?
    Reply
  • B3an - Thursday, December 20, 2012 - link

    One thing that stood out to me in this article, is the bugs/reboots you encountered. You pretty much blamed them on Win 8, or made it sound that way. Which i thought was unprofessional, especially for you Anand. As theres a very good chance they're to do with a particular app, drivers on this device, or even it's hardware. Win 8 is a very solid stable OS, even more so than Win 7 on release. Reply
  • ltcommanderdata - Thursday, December 20, 2012 - link

    True. But hasn't it always been the case that app and driver instability gets fairly or unfairly associated with Windows? At the same time, when things are working well, Microsoft is happy if you think of yourself as enjoying a "Windows" PC or tablet regardless of what particular software or hardware you are using in/on Windows. I guess we'll have to see how common problems are with other CloverTrail tablets. If they show up in CloverTrail tablets from other manufacturers, then even if the underlying OS is stable it still becomes Microsoft's problem if people are having trouble developing reliable apps/drivers/tablet using it. Reply
  • Anand Lal Shimpi - Thursday, December 20, 2012 - link

    The issue is these were first party apps developed by MS, and I've seen some evidence of the same on other non-W510 platforms (I just don't remember this being the case with Surface RT but I've been using these x86 platforms longer than I did Surface).

    I'm curious to read Vivek's take on the ATIV Smart PC to see if it mirrors my experience.

    Take care,
    Anand
    Reply

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