Guys, just to let you know...
I have an iPhone 5, posted here twice already and i have tried everything suggested...still doesnt work for my battery drain problem...
I don't have an Exchange account, never had one in the iPhone, only two Gmail accounts. Draining still occurs and nothing i can do about it...
The only thing that works for me, but unfortunately almost renders the phone useless is using flight mode. Usually when i turn on flight mode it can hold up to 100% in 8 hours. When i turn it off, the draining starts again...This is related to network activity, but its really strange because as way of testing what works the best for my battery i have Wi-fi almost off all the time, 3G or LTE turned off most of the time, rarely use Bluetooth, never use Siri, push and locations are disabled and iCloud syncing is disabled as well...
This is what iOS 6.1 did to my phone...rendered it useless...i need to have battery to make phone calls and receive texts...if i use everything else, the draining occurs even faster...Im only managing an average of 13h of stand by and 2 hrs and a half of active time...and it goes to 0%. Taking in account that i have the phone in flight mode for 8 hours, then it technically goes from 100% to 0% in 7, 8 hours...
So...this is NOT only related to Exchange Accounts, it might be one of the causes, but not the only one...I can tell you that.
Flight mode and two battery tests at an Apple Store confirm that battery is good. The only thing doing harm is iOS 6.1, which failed on those store tests...
Apple, seriously...fix this.