I have a jailbroken 64gb 4S from April and my brother has a 16gb non-JB from earlier this month. We both get around 4 hours 30min to 5 hours of battery life according to the Usage tab. Standby time didn't seem to affect the battery much, as I get the same amount of run time wether or not it has 1 minute of standby or 10 hours. It also didn't matter if I was shooting video most of those 5 hours or just texting and web browsing. Does this sound normal? I know the 4S drains battery but this seems a little too fast.