Current beta 5 on iPhone 5S is terrible. Battery drain is just too much.
I am predicting that this battery drain will remain even in GM release. Then people will complain bitterly on internet about poor battery life. Then reluctantly, Apple will fix battery life after few months on it. But damage has already been done. Most have moved over to new shiny 6S. Awesome strategy.
Planned obsolescence at it's finest.
I believe you had the same bug as mine, Photos was draining all your battery even though you shut off everything about it, delete every single photo, sign off from iCloud, turn off background refresh, and turn on battery saving mode.
Dude, if that makes the GM release, and kill the iPhones like mine in under an hour, Apple will have to address that and ASAP. I don't think it has anything to do with planned obsolescence.