I agree when it's in standby something is draining battery, overnight my phone can easily drop by 30% with nothing but mail checking every 15 minutes, that's an awful amount of drain for a few emails.
My biggest problem is that Apple sold me a phone with Location services and various other features turned ON and now suggestions are to turn them all off, how ridiculous, defeats the purpose of even having the latest 4s with the latest ios5. Its like selling me a Ferrari and telling me to only drive it at 15 mph, how insanely ridiculous.
Now in my case, just to humor myself I have turned just about everything off and I have No improvement in battery life whatsoever. This afternoon I did the following:
- turned off location services
- turned off ask to join networks
- turned off screen auto brightness
- set screen brightness to 35%
Then
- fully charged to 100%
- turned phone fully off
- restarted phone
Since then I have done the following:
- browsed 5 pages on safari
- received 2 SMS/text messages and sent 1
- sent 3 whatsapp messages to one contact
Battery has drained to 85% with just those few little things, I have not even made one call.
What irritates me is some users who have 5.0.1 report improved battery life while others have very VERY poor battery life. Then I discovered there's different versions of ios5.0.1 each ending with a different firmware number, mine is 9A405 and I've seen users posting here with much higher firmware numbers but apple gives no way for us to download the later version of 5.0.1. Annoying yes, silly most certainly. Why not let ALL users have access to the latest firmware then we can actually compare apples with apples (excuse the pun)
I'm now also told I must wait until iTunes decides to check again, apparently on the 11th to see if apple will grace me and many others here with the latest firmware. It 's so annoying because this phone is not even 9 days old and performed like this since the iOS 5.0.1 update the day we setup the phones. I know this phone has the ability of good battery life but it seems there's buggy versions of firmware and others that fix it.