Posted September 08 2012 - 08:05 AM
The battery life problem is a two pronged issue. The obvious one is that the processing, screen, and 4G radios all cause much more battery drain than you get on, say, on a Blackberry. But stack the two devices up -- the Blackberry is practically a feature phone in comparison to the S3, and as the saying goes, "you get what you pay for". In this case, the cost is rapid battery drain.
But the battery issue is compounded by the fact that the S3 is so capable of so many things that you will tend to use it more. Much more. If you used the S3 like a Blackberry, just for texting, a few calls, and checking your emails, you could get a full days use. If you disabled the 4G radio, you might hit 2. But if that's all you do with it, why did you bother? When you couple an inherently high drain device with increased use, you're looking at a total battery hog.
I also think there something inherently and grossly inefficient with the way Android handles cellular standby. I had an Evo that couldn't last the day even if it were sitting idle. Most of the battery was sucked up by the cell phone standby process. When I upgraded the the S2, I turned the Evo into a wifi only PDA. The result? It could last 4 days on one charge, and that's with wifi on the entire time.
Note that your use case will determine how much battery you use. If you don't have a lot of apps that background sync and don't have EAS or frequent email polling times, you can get a day or even a day and a half out of the S3.
I used to get a full city work day out of my Palm and WinMo devices back in the day. When I got the Evo, I was at 50% by the time I hit the office. But I adapted. I got a spare battery and acclimated myself to bump charging. The trade-off was such that it was worth it.
The spare battery really makes it workable. I would never get a phone with a sealed battery. My wife used to get jealous when she drained her iPod Touch and had to wait until it charged. I would drain my Evo in half the time, but other than the interruption in rebooting, I just kept going throughout the day since by the time one battery was drained, there was a fully charged on waiting for me.