Just as a test, I had my 4S on overnight without using it. Virtually everything was shut down except 3G Network and Wi-Fi. No Siri, no push, no location services... From a 100% charge at 9:57 pm to a 64% charge at 7:05 am...a third of the battery capacity gone with nothing happening. So, I'm wondering. Just what does Apple mean when it claims approximately 200 hours "stand-by" capacity for these phones? Is there a listing somewhere of what can be turned "on" during standby and what should be shut down? Because the results I got would indicate my phone battery would be dead in about 24 hours, even if I were not using the phone.