Yea, I do. Brightness and WiFi off? Are you JB? If so, the tweaks installed may be the problem. Also, if you have no signal just put in airplane mode. Searching for signal kills battery.
It can't be the generic device or the firmware since the hardware and firmware is exactly the same for all carriers...so it is either the unit itself or the Verizon service; test it against another Verizon 4S. If yours drains more battery than the other 4S on Verizon, exchange the unit AGAIN.
Bottom line is No Signal = Bad battery. It isn't my device because it was the same on my last phones from Verizon. My friend has a Verizon 4S and he said that if he leaves his phone on during the day he will loose a ton of battery too so its just Verizon not my phone.
I think it's because the phone looks for a 3G connection, which uses more battery when 3G isn't available.
Lol yeah at 1:38. You should try disabling 3G while you're in school because your iPhone is constantly searching for a 3G signal which will destroy your battery. It could also be your iPhone battery that's probably going already, although it shouldn't. Try testing how long your battery last on normal usage where you get 3G service, 5 bars, etc. and test it against in your school.