Putting Power in Perspective: Estimated Battery Life of a Moorestown Phone

I wanted to get Moorestown hardware in time for the launch but unfortunately nothing is quite ready yet, so we’ll have to rely on Intel’s data.

As I just mentioned, Intel expects a Moorestown phone to idle at 21 - 23mW. Paired with a 1500mAh battery that’s 10 days of standby time. Intel claims that Snapdragon phones idle at 25mW. If that’s true then Moorestown is competitive.

Audio playback is expected to consume around 120mW of power (for the entire platform, not just the silicon). Intel estimates that’ll get you around 48 hours of continuous music playback. Intel was quick to add that this is better audio playback battery life than anyone else on the market today, although both TI and NVIDIA are promising better battery life than that with their next-generation SoCs (OMAP 4430 and Tegra 2).

Moorestown Battery Life (Figures by Intel)
  Total Phone Power Consumption
Idle 21 - 23 mW
Audio Playback 120 mW
1080p Video Playback 1.1W+
Web Browsing (WiFi) 1.1W
2G Phone Call 550 mW
3G Phone Call 1.2W

Intel’s video playback estimates are lower than the competition, Moorestown is expected to only provide 5 hours of continuous HD video playback compared to 10 hours on an iPhone 3GS. That comes from 1.1W+ platform power consumption during video playback.

Intel estimates that Moorestown based devices will last about 5 hours when browsing the web on WiFi. Talk times are expected in the 4 - 5 hour range over 3G, and 8 - 10 hours on 2G.

If these numbers hold true in shipping Moorestown devices, I’d expect to see anywhere from iPhone to iPhone 3GS levels of battery life. Audio decoding seems good, while other aspects like video playback aren’t so great. Web browsing power consumption really varies based on the test. I measured power consumption on my iPhone 3GS and saw 1.1 - 1.3W while loading the AnandTech front page. That would imply Moorestown platform battery life could be competitive.

As soon as I can get my hands on some actual hardware I plan on verifying all of this data myself. Intel claims that the top 5 handset manufacturers see power consumption in the 750mW - 1.5W range, so Moorestown should find itself right in the middle of all of them.

OS Driven Power Management The Intel GMA 600 by Imagination Technologies
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  • strikeback03 - Thursday, May 6, 2010 - link

    Actually, at least on Verizon, there are not many phones that last more than 2-3 days with relatively light use (5-10 min talk, 20-30 txt per day). This is actually something that has gone down in the past few years, as even basic phones get flashier UIs and use more power to run them. And while I support having some phones with weeklong standby time, I am fine with charging my phone or switching batteries every night so long as the phone can last a day in moderate use, which the Snapdragon phones typically can. I like to be able to access more than talk and text on the go.
  • v12v12 - Monday, May 10, 2010 - link

    WOW... standing ovation... All of my Droid friends are laughable! Constantly tethered to a power outlet! Always doing something useless and for sure entertainment Vs thinking quietly with their minds... pretty soon "dude I gotta go, my phone is about to die," yeah umm just how many hours have your spent actually TALKING on the dang thing vs playing around with it constantly like some personalized TOY?

    Battery life should be much more focused upon... The cattle-minded consumers are at it again; now tell me, had to only have 1 car, would you also buy a car that gets the WORST miles per gallon, but has a bunch of silly go-fast features that have you constantly at the fuel pump Vs getting to where you need/should be? Course that's why people usually own 2 cars to separate those needs Vs desires.... Today's "Ferrari" phones have the everyday idiot rambling along, bumping into shit, with their heads constantly fixated on the "screen," like drones. Talking...(?) haha you rarely see people talking with these things, it's just constant "entertainment," even in the most hindering places and social situations. So everyone's got a "Ferrari" phone, but end up trying to use it like a honda; sorry it just doesn't work like that. Faster = more fuel, LESS actual usefulness.
    __I'd rather have a phone with a decent amount of enjoyable features, that I can actually take with me on a trip to places that may or may not have power ON-DEMAND lol..
  • juampavalverde - Wednesday, May 5, 2010 - link

    The article and the new product is really interesting, but intel aint ready yet for smartphones, actually this moorestown platform looks much more interesting for pads and handhelds, having more space for such amount of chips, also being x86 with a custom linux. something like an ipad powered by this kind of atom starts to make sense, both from the performance and the battery life
  • WorldMage - Thursday, May 6, 2010 - link

    The interesting thing about all of the power draw figures given is that they were for workloads where
    the ATOM would be doing almost nothing. Video decode is done by the video decode HW where the
    atom might wake up every few seconds to load the next batch of data, similarly for audio playback and
    talk time (as you point out cellular modem is the only thing doing work). The thing that gets closest is web browsing, but assuming they are browsing 'static' pages (i.e. no Flash) the atom does a bit of work and probably sits essentially idle for easily 90% of the time.

    So it's not surprising they are in the same ballpark as other SOC's for those workloads since they seem to essentially be using the same HW blocks as the competing SOC's. I think it's very telling that all of the power consumption figures from Intel were for essentially non-Atom work loads.

    To which you might say "so what?" if those are the work flows that you care about, but that would ignore the fact that the whole point of the atom is to enable "fancy" UI's (and perhaps games) with lots of animation and stuff happening in the background and actually making use of the power of an ATOM.
    If you can't actually power the ATOM for an hour of actual use (browsing contacts, checking flights, web pages with Flash ads etc) won't the smart phone be almost worthless?
  • Th3Loonatic - Thursday, May 6, 2010 - link

    On page 3 of the article you misnamed the chips. The one on the left is Lincroft and the one on the right is Langwell.
  • Electrofreak - Friday, May 7, 2010 - link

    Anand, Cortex A8 on the 65 nm feature size is reported to use about 0.59 mW per MHz under load, and Cortex A8 on the 45 nm feature size is reported to use 20-30% less than that. For a little bit of added beliveability, Qualcomm's Snapdragon sips in the vicinity of 0.5 mW per MHz on the 65 nm scale, though that may be under optimal circumstances / marketing spin.

    Ultimately it's roughly half the power consumption Moorestown is reporting. And we notice that nowhere does Intel actually compare their power consumption figures to ARM's.

    Additionally, I was under the impression that the A4 had a dual-channel memory controller. I would guess LPDDR2 memory as well, but your guess is as good as mine.

    I suspect the S5L8930 in the A4 is a PA Semi (remember Apple bought them) reworked Samsung S5PV210, the dual-channel controller tablet / MID-oriented sister chip to the Samsung Hummingbird S5PC110 (which uses a single-channel controller with LPDDR2 support, if my resources are to be trusted.)
  • pradeepcvk - Tuesday, November 1, 2011 - link

    Anand liked your brief of S0Ix wrt Meego. I wonder how would it work with windows ACPI.
    could you please have an article for the same.

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