Turn off wifi; I don’t have an iphone but the ipod touch and the battery runs out SOO much quicker when you are connected to the internet. There should be a option in settings that lets you turn it off. Also DONT turn off it fully. Put it to sleep or whatever it is. When you turn it off properly it uses allot of battery to turn on again. Hopes that helps
Battery has up to 10 hours of 2G talk, 5 hours of 3G talk, 5 (3G) or 6 (Wi-Fi) hours of Internet use, 7 hours of video playback, and up to 24 hours of audio playback, lasting over 300 hours on standby
January 27th, 2012 | 
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well, wouldnt they state the standby and talk time on the specifications page on the website?
Turn off wifi; I don’t have an iphone but the ipod touch and the battery runs out SOO much quicker when you are connected to the internet. There should be a option in settings that lets you turn it off. Also DONT turn off it fully. Put it to sleep or whatever it is. When you turn it off properly it uses allot of battery to turn on again. Hopes that helps
Battery has up to 10 hours of 2G talk, 5 hours of 3G talk, 5 (3G) or 6 (Wi-Fi) hours of Internet use, 7 hours of video playback, and up to 24 hours of audio playback, lasting over 300 hours on standby