Much awaited Android 4.4.2 KitKat build was released for Xperia Z, ZL, ZR and Tablet Z by Sony recently in form of 10.5.A.0.230 firmware update but unfortunately along with many cool features of KitKat it brought a very problematic battery drain bug with it. Xperia Z KitKat users on 10.5.A.0.230 firmware are reporting a battery drain issue due to Google Play Services latest version which Sony support recently acknowledged on its forum also.
Just now 10.5.A.0.233 firmware is certified on PTCRB for Xperia Z, ZL , ZR and Tablet Z which if rolled out will be the second release of KitKat build so far. 10.5.A.0.233 firmware is certified for all variants of above mentioned Xperia handsets. Check below for the PTCRB certifications screenshots.
We will keep you updated as soon as 10.5.A.0.233 firmware starts rolling. Let us know which bugs you are currently facing on present firmware. Drop your comments below.