check back previous thread, Uncle Benny share his battery life. He can easily OST 6-7 hours with data on and use heavily for net surfing and email.

Diff area diff outcome.. Coz mobile data its still depend on coverage and signal. Take note, uncle benny shared he is only turned on data and surfing. No gps, no auto sync and turned on stamina mode.. For those unable achieve same outcome, just don't worry..

If your area low signal for mobile data, phone will consume more battery..

E.g. I'm worked at aeon mall, I can get 3 hours sot in total 10-14 hours.. Low signal reception.
But if I'm use in my home, I can get 4 hours+ sot in total of 10-14 hours..

*my settings is turned on gps, data, auto sync all the time without turn on stamina mode.

**im using xperia zl. I'm just sharing it to prevent ppl complaints bad result of battery life.. Anyway, for average, people who are working or studying are rarely turned on their phone more than 3 hours in daily time. So don't worry for your battery life, shoulda enough for your whole day usage.

I have consistently achieved minimum 6 hours SOT with following : 3G on 24/7, stamina mode on, bluetooth and GPS off, autosync on. And these are about 80% on internet stuffs ( browsing, email, facebook, tweeter, various RSS newsfeeds), 1 hour+ using gyrometer/accelerometer for pedometer n others are whatsapp, call-sms, ebook .
If I switch to wifi, I can get another 1-1.5 hour SOT
I'd say this phone has quite good battery life
For working people, I'd say you wont be using your phones 6-7 hours on a 8-10 working hours day - so absolutely no worries about battery life. Even with 4-5 hours SOT is sufficiently good enough
Put the phone on stamina mode if you wont be using it - it really help to conserve battery. Whitelist those apps eg (for me is whatsapp and messenger) if you do not want stamina mode to interfere