I recently got a replacement iPhone 4S, after my old one got stolen. I previously had to recharge my phone every night to make it through the day, but with the replacement phone this seems to have changed to every second day (maybe even every third, but I haven't tested that much yet). I've successfully tried this twice now, which I never ever did with my previous two iPhone 4S models I had. At the end of one normal day I had 80% of the battery charge remaining, while after a day of heavy usage it still stood at around 70%, far more than the typical 50% that i had on my old iphone 4S. Anyone have any leads as to whether Apple is now using the 32nm A5 chip for the iPhone (as with the apple TV and ipad 2)?! Or has Apple even switched to an upgraded GSM chip?! Unfortunately I'm not curious enough to take my iPhone apart and dismantle the chip to see for myself..