The battery on this phone is not bad, i would say it limits on what i would call minimum use. But not as good as the Lumia 1520.
My 1320 can serve as my survival phone when we lost in the woods. It has the same juice as the 1520 with 3400mAh battery, and a lower consumption dual core cpu. Makes it the best and battey-reliable Lumia phone ever made in my opinion.