How long is your on screen time? Press at "screen"...For stock battery, it should give around 3 hours screen on time. Note and S3 is newer in terms of chipset architecture. It's also possible that the amoled in nexus is more power consuming. It's the first generation super amoled hd. What's your normal usage on your phone? What you usually use your phone for?

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Added on October 24, 2012, 3:02 pm
3 hours because of the whites of web pages. Amoled consumes most power to display white. Most often website got white or near to white colour background. Note also doesn't fair well in web browsing. Look at how iPhone5 can last 9 hours on web browsing test.

hmm, data push on gnexus?? u sure hox 8hr8% win??
i would say par then, i get 1hr 0.7-0.9% drain on data only peak at 1% when i get tons of email during the day

my current average is
4hr on screen with data n wifi and many services, auto brightness as im under the sun most of the time.
lasts from 11pm till say 8pm next day.

im guessing u're not tuning that heavily yet