Apple has released the update to iOS 6.1.3 to the public during the past week, the new firmware had the aim to resolve the security flaw that allowed bypassed with some simple code to unlock the lockscreen.
Problems Battery Life on iOS 6.1.3 Update
Users experience a serious decrease in battery life without understanding what is the real reason. A reset of the device does not seem to be a solution and to holders of an iDevice to iOS 6.1.3 updated report losing 1 percent in a few minutes consequently fail to reach the evening. Dear readers is not update your iOS 6.1.3, please not make this. is not good for your battery life.
To hope the Apple will be resolve this problem very soon.