A pretty good job but NOT the most accurate either. Remember this testing is based on a fairly clean slate. We dont know exactly what is running in the background when they do these tests or what they have disabled.
Anandtech and GSMARena claimed over 10+ Wi-Fi browsing with the One and all I get is about 5 hr screen time browsing. This is with many bloatware apps disabled. Even with a static wallpaper, I still get 18-20% drainage per hour on Wi-Fi. And I dont use FB app either. Texting mostly or lower res videos is abt 6-7 hrs screen time. Play 1080p, and it drains faster. I never trust it because it varies with the actual user's usage.
You got to understand when they do browsing tests, they probably just have the browser open and do nothing but stay in the browser until the phone dies. When other people use their phones, that's not how we do it. That is why I said earlier that seeing a combination of these results can give a good idea towards battery life. Their results for the Nexus 4 show crap battery, and that is exactly what I get.
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I don't think it is just a CDMA version. That link says it will be announced next month, but there were already references to Android 4.4 with the phone. No way can a manufacturer release a phone with the newest version at the same time Google announces it.
Plus the FCC filing showed pictures completely different from the G2. Different design, different buttons, and different camera placement. Plus this design matches up with the unknown phone in Google's video. I think they are wrong on this one.