iPhone 4S iOS 7 Battery Drain
I haven't seen that problem with iOS 7.

Have you tried restarting or resetting your iPad?


  Restart: Press On/Off button until the Slide to Power Off slider
  appears, select Slide to Power Off and, after the iPad shuts down,
  then press the On/Off button until the Apple logo appears.
  
  Reset: Press the Home and On/Off buttons at the same time and hold
  them until the Apple logo appears (about 10 seconds).


If these don't correct the problem connect to iTunes and do a restore.

If all else fails to do so:

In Settings, turn on Airplane mode, then reset your device by holding Power + Home button 15 seconds until you see the Apple logo. Power back on, then turn off Airplane mode.