iPhone 5/ipad rapid battery discharge - solution
A couple of days ago I noticed the battery discharge rate on my iPhone 5 and iPad (3) was all of the sudden really fast. I was dropping almost 20% per hour with no activity on my iPhone. I did the usual stuff, disabled location services, stopped push emails, and even removed some of the apps that were new or updated in the last few days. None of the modifications I had made made an impact...same battery drain, same constantly warm phone.
When I checked the error logs, there were many for dataaccessd. I loaded a system monitor app and the top processes were: dataaccessd and reportcrash. Then my wife told me her iPhone 4S was also discharging quickly the last couple of days. So I deleted my iCloud account and had it delete all it's info from my phone. Rebooted and set up iCloud again. Those two processes are not at the top of the list anymore, and after 2.5 hours of minimal use, my iPhone has dropped from 100% to 99% battery level...and it's cool to the touch.
It must have been a corrupted iCloud file, maybe in the Calendar, that was constantly trying to synch?