Is this the problem with iPhone 4S battery life?
I've updated to 5.0.1 and my battery still drains dramatically.
What is strange is that if I go to Settings->General->Usage, the Usage time is always more than 60% of Standby-time, even if I don't touch the phone, and with all settings turned off (notifications, wi-fi, cellulardata, iClous, bluetooth, siri, localizations, iMessage, Facetima ...) and no background application running.
I have many friends that own an iPhone 4, and no of them have a such high usage time, compared to the real use they have with the phone.
Are you experiencing similar usage-time/stanby-time ratio with your iPhone 4s?
iPhone 4S, iOS 5.0.1, 64 Gb