Have a look at the forums about the battery life. There are ways to help- if its gotten worse than before the update.
*note- the battery is calibrating for the first 14 days.
Credits
@Moiramon, @Iminvti and
@Piper123Dial *#9900# then scroll down to battery stats reset. Click then restart your phone.
Make sure Auto Blocker is off in settings- security and privacy.