[HTC Droid DNA] BarryH_GEG:
LTE? Is that something new? ;)

How does the [Droid DNA's] 2,020mAh battery hold up to a screen that's constantly pushing more pixels? Our standard rundown, which involves

running a video on an endless loop, resulted in the phone holding out for six hours and 38 minutes

, which isn't quite as good a showing as we saw from the One X+ and Optimus G on the same test. In terms of real-life usage, the DNA got us through a full day on moderate use, but it's quite apparent that the screen will drain the battery much faster, so frequent users will need to keep that in mind before heading off on the daily commute. There's a good chance you'll make it through a regular eight-hour workday if you're constantly using your phone, but you'll be cutting it pretty close. If you haven't already done so, it may be worth investing in a Qi pad for the office.

http://www.engadget.com/2012/11/16/htc-droid-dna-review/

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Even with LTE enabled, battery life is noticeably better on AT&T's One X than on the foreign version. This was a sticking point in our original review, so we're extremely pleased with the improvement.

We recorded eight hours and 55 minutes in our video loop rundown test

with the screen set to 50 percent brightness -- most folks will have little trouble getting a full day's use from the 1,800mAh cell. Call quality was decent, but LTE performance exceeded our expectations with peak speeds of 35.7Mbps down and 23.5Mbps up (!) -- the fastest results we've ever recorded on an LTE device.

http://www.engadget.com/2012/05/01/htc-one-x-for-att-review/​

S4 and S4 Pro (v2 is what's currently available) use an identical architecture. The difference is the GPU. So unless one believes that the new more powerful GPU is somehow more efficient than the less demanding older one, the GPU in the quad-core S4 will draw as much (and most likely more) power as the dual-core version. And under high-demand I don't think there's any question four identical cores are going to draw more power than two.

At present, this is the same Krait CPU as what we've seen in MSM8960 in phones like the USA versions of the Galaxy S 3 and HTC One X. Later on, Krait v3 will emerge with higher IPC and shorter critical paths (and clocks up to 1.7 or 2 GHz) and a resulting 10-15% boost in performance. For now however we're looking at 1.5 GHz APQ8064 with a Krait v2 inside and Qualcomm's newest scalar GPU architecture with Adreno 320. We're going to talk more about Adreno 320 closer to devices shipping, when Qualcomm feels comfortable talking architecture.

http://www.anandtech.com/show/6112/...agon-s4-apq8064adreno-320-performance-preview​

Ergo, a device with an 11% larger battery will only get similar battery life to a device with a 4.7" LCD 312PPI if one believes that a 5" 441PPI LCD doesn't draw more than 11% more power and that's not accounting for the additional load of the two extra cores. Since HTC/Qualcomm coded the drivers for both the XL and the DNA it's unlikely some programming miracle occurred between the release of the two devices that dramatically impacted battery life. And the DNA has a disadvantage over the XL because CDMA in fringe signal areas is tougher on battery life than GSM.