Hello........i am new own Xperia Ion(Black).Looks like most everyone feedback abt battery life span as i also agree with it.This is 1st time i use Andriod phone.All these while i've been using Sony K618(white) which still in working condition Neverless i had tried to sw On wifi from morning 9.00am till 5.30pm then reach home to sw back On wifi again approx 8.00pm and battery still last untill midnite(battery flat).Personally these Xperia Ion impress me on bigger screen.I was actually targeted Xperia S(white) but end up it's own by my home minister Didn't update new version software , remain use stock software.......