Originally Posted by joesixpack
I can't believe nobody has told you this, but the biggest reason your iPhone 4 had better battery life is because it is a 3G phone. Since your S4 is 4G, it will use more battery due to radio switching and the sheer power demands of the 4G environment! That is the nature of the beast. That extra inch of screen size will have a big effect as well.
I'm a light to moderate user and usually have at least 60% left by day's end! So, as was stated before, buy yourself a spare battery and swap out if/when you run low (can't do that, Apple!).
Fire up that S4 and don't look back!
On that note, I wonder if anyone has experience with a pre-iPhone 5 and iPhone 5 in terms of battery life. I know asking in an Android forum isn't the ideal place, but just wondering. iP5 vs. iP4S or lower would have similar issues, namely larger screen size and 4G vs. 3G.
I just activated my SGS4 and haven't transferred my apps and data from my Droid 3 yet. So I'm just using the SGS4 mainly to text and surf. I haven't even made a phone call yet. (Who uses a phone for making call these days?
) I also noticed that every few min. of surfing would decrement the battery by 1% that the thread starter mentioned. If I extrapolate that and assume linear battery consumption, that would give 5 hours of surf time (screen is auto-brightness). Seems reasonable.
My battery was already about half charged when I got it and I wall-charged it to full before using it. I fully drained it by yesterday morning and it took over 7 hours to charge it by USB. That's way longer than it took my D3. That said, since the S4's battery is about twice the capacity of the D3, I guess it'd take twice as long since USB can only push out so much power.
One day, I'll use my Kill-A-Watt to see how many watts it takes to wall-charge my phone. My D3 took a few W, pretty much negligible.