Battery Life

One of the things Qualcomm promised would come with Snapdragon 800 (8974) (and by extension the process improvement with 28nm HPM) was lower power consumption, especially versus Snapdragon 600 (8064). There are improvements throughout the overall Snapdragon 800 platform which help as well, newer PMIC (PM8941) and that newer modem block onboard as well, but overall platform power goes down in the lower performance states for Snapdragon 800. In addition the G2 has a few unique power saving features of its own, including display GRAM (Graphics RAM) which enables the equivalent of panel self refresh for the display. When the display is static, the G2 can run parts of the display subsystem and AP off and save power, which they purport increases the mixed use battery life case by 10 percent overall, and 26 percent compared to the actively refreshing display equivalent. In addition the G2 has a fairly sizable 3000 mAh 3.8V (11.4 watt-hour) battery which is stacked to get the most out of the rounded shape of the device, and utilizes LG's new SiO+ anode for increased energy density compared to the conventional graphite anode. 

Our battery life test is unchanged, we calibrate the display to exactly 200 nits and run it through a controlled workload consisting of a dozen or so popular pages and articles with pauses in between until the device dies. This is repeated on cellular and WiFi, in this case since we have an international model of the G2 that lacks the LTE bands used in the USA, that's 3G WCDMA on AT&T's Band 2 network. I've tested 3G battery life on devices concurrently for a while now in addition to LTE though, so we still have some meaningful comparisons. The most interesting comparisons are to the Optimus G (APQ8064) and HTC One (APQ8064T) previous generation.

AT Smartphone Bench 2013: Web Browsing Battery Life (3G/2G)

AT Smartphone Bench 2013: Web Browsing Battery Life (WiFi)

Cellular Talk Time

The LG G2 battery life is shockingly good through our tests, and in subjective use. The combination of larger battery, GRAM for panel self refresh, new HK-MG process, and changes to the architecture dramatically improve things for the G2 over the Optimus G. While running the two web browsing tests I suspected that the G2 might be my first phone call test to break 24 hours, while it doesn't break it it comes tantalizingly close at 23.5 hours. I'm very impressed with the G2 battery life.

Device Charge Time - 0 to 100 Percent

The G2 also charges very fast for its battery size. I've been profiling charging behavior and current for devices for a while now, since I strongly believe that battery life and charging speed are complementary problems. You should always opportunistically charge your smartphone, being able to draw as much while you have access to a power outlet is critical. The G2 can negotiate a 2A charge rate on my downstream charge port controller and charges very fast in that mode. Of course the PM8941 PMIC also includes some new features that Qualcomm has given QuickCharge 2.0 branding.

Display CPU Performance


View All Comments

  • Doh! - Sunday, September 08, 2013 - link

    Yup, my brother just bought this phone in Korea. It has both the microSD slot (upto 64 GB) and a replaceable battery (2610 mAh). Reply
  • UpSpin - Sunday, September 08, 2013 - link

    or in the US are some expensive license fees for SD-Cards (HALA, and stupid patents on removable batteries, which are less in other regions or non-existent at all. Reply
  • skiboysteve - Saturday, September 07, 2013 - link

    wow the EIS is surprisingly good! Better than OIS for some. However I won't buy a new device without OIS... The non blurry photos without having to be perfectly still is amazing Reply
  • greywolf0 - Saturday, September 07, 2013 - link

    TherThere's something wrong with your OIS test for the Lumia 1020. It is way too jittery. Reply
  • Novulux - Saturday, September 07, 2013 - link

    I am about ready for a new phone, and frankly, I'm having a hard time deciding between the LG G2, Xperia Z1, and the Xiaomi MI3. :O Reply
  • abrahavt - Sunday, September 08, 2013 - link

    I am in the same boat. Waiting for the Nexus 5 before deciding. Reply
  • PC Perv - Saturday, September 07, 2013 - link

    I am usually critical of AT's smartphone coverage but for this one I have nothing much to fault for. Thank you for thorough review. oh and I don't think 3D Mark is a legitimate benchmark. I think AT can do away with it. Reply
  • wanderer000 - Saturday, September 07, 2013 - link

    Holy crap, the image stabilization on the Moto X is amazing......Just wish it had the image quality of the Lumia 1020 :/ Reply
  • madwolfa - Saturday, September 07, 2013 - link

    GLBenchmark has always favored Apple devices heavily. I don't understand why is it still included in the tests? Reply
  • Spunjji - Monday, September 09, 2013 - link

    If that bias also reflects developer bias then it's relevant. Reply

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