We (my wife and I) are having the same battery problem since iOS7.06 on our iPhone 4S - 16GB.
The stand-by time and usage time indicate the same time. In the past we were able to use our phones without charging between 07AM and 10PM (iOS7.04) but since 7.06 we need to charge our phones around 5/6PM.
We already tried quite a few things:
- press home + power button for about 10 seconds and wait till apple logo comes up
- turned off/on phone
- removed sim
- flightmode on/off
- bluetooth off
- only use WIFI home, work, at family, friends (so no 3G)
- removed e-mail accounts and connected them again (e.g. Gmail account)
- to reduce the battery drain for a but we already changed these things or added these:
* fetch e-mail per hour (2 accounts) - no changes there (was already the case on iOS7.04)
* no dynamic wallpaper - no changes there (was already the case on iOS7.04)
* iCloud > 'Find my iPhone' is turned off, only contacts and agenda are on
* Privacy > Locations' > only a limited amout of apps is turned on which we rarely use during weekdays: Google Maps, Kaarten, Weer
System: only compas calibration is on. - no changes there (was already the case on iOS7.04)
* Reduce motion: off
* Refresh apps in background: completely off - no changes there (was already the case on iOS7.04)
* Siri > off - no changes there (was already the case on iOS7.04)
* Message center > only on for (phone, messages, agenda, facetime and whatsapp) with badges, sounds or bars
* Settings > 'General' > 'Set again' > 'recover all settings' done but doesn't make any difference
I hope iOS7.1 will be the cure for our phones again to have no more battery issues (drain) anymore.