Sony has acknowledged the battery drain issue with Android 4.4.2 KitKat update for Xperia Z series devices.
Last month, Sony had confirmed the availability of Android 4.4.2 firmware with build number 10.5.A.0.230 for Xperia Z, Xperia ZL, Xperia ZR and Tablet Z.
Along with performance improvements, the KitKat firmware brought with it user interface optimisations and updated native apps with several tweaks and enhancements.
However, many Xperia users who upgraded to Android 4.4.2 10.5.A.0.230 build reported to have quick battery drain issue, notes XperiaBlog.
Apparently, Google Play Services is the primary reason for such poor battery life and several users have reported the issue at Xperia support forum.
Sony has now acknowledged the battery performance issue and notes that they have identified the root cause of the battery issue that is related to latest version of Google Play services 4.4.52.
http://www.ibtimes.co.uk/sony-acknowledges-battery-issue-xperia-z-zl-zr-tablet-z-android-4-4-2-fixes-available-1451677
Anyone else having problems with their phone?