iPhone 5 battery life situation.

I'm on iOS 6.1 and I get about 7-8 hours of usage time on my iPhone 5.This is WITHOUT LTE ,without mobile data and with iCloud disabled.When I enable iCloud my battery drains massively and the phone dies after 8-9 hours of just standby and 3-4 hours of usage.I don't know why Apple doesn't acknowledge these battery life bugs ,their forums are full of it as well.

What kind of battery life are you getting with your iPhone 5?