Isn't that question out there already?
But it's the same technology battery so the life span as in number of discharge/charge cycles is the same. And as everyone knows, you can get less time with certain apps, wifi on/off etc.
Did you miss all the prior discussions?
I've heard the battery life of the iphone 5 has been severely compromised and it's not as good as the 4S. Is this true and what is average battery life of the 5