Engadget
"Battery life is yet another segment of the performance that's confused us. Since the Nexus 4 uses the same 2,100mAh battery (and power-friendly Krait chip) as the Optimus G, we expected to record essentially the same runtime. Much to our surprise, however, it was considerably worse in both our tests and our real-life use. Our standard video rundown test, which consists of looping a movie at 50 percent brightness with WiFi on (but not connected) and normal pull notifications for email and social media, lasted for five hours and 18 minutes before the battery died. Our anecdotal tests -- in which we do a moderate amount of email, social media, messaging, web surfing and take a few pictures and make some phone calls -- almost got us a full day of use, but your overall result will definitely depend on how bright you set that display. Regardless, the experience we had with both of our review units is still a stark contrast to the Optimus G, which lasted over eight hours in the video rundown test and 20 hours with moderate use."
