I just got a 4s a few days ago and it's my first iphone. I've read many articles on the battery drain issues with ios 6.1.3 which is what my phone is usin. It's not jailbroken, I've followed all the advice as for turning off location services, icloud, reset the phone as new etc etc. I used my phone for a 32 minute call and the batter went from 100-79%. In standby it will drop about 8% overnight with no apps running. Apps installed - Youtube Zedge Whatsapp Paypal Instagram FB Messenger Dropbox Skype I have notifications turned off for all of them. Tis isn't as bad as most battery drain issues I've read about but Is this battery usage normal for iphones?