Battery life was/is an issue with smart phones Iv learned. My particular phone the desire s is now lasting 4 ish days but still with 20 or 30% left, I have bluetooth turned on all day at work and talk several times a day, and browse for about ten minutes a couple of times too. I tried a battery recalibration which seemed to work, and only turn on mobile network and wifi when I want to use it. As it stands its lasting longer than my text and call only phone did, which I had to recharge every two days to make sure there was enough charge in case of an important call. The screen size is great for me, and everything is smooth and clear, only issue for me is the speaker when on loudspeaker, it seems a little crackly sometimes, but is still better than my last phone. There is lots I still dont know how to use on it, but Im getting there.