Well i can say with confidence that the battery drain issue plaguing the s3 4.3 update certainly are not present here. Being that WanamLite 4.2 is the first 4.3 release I've installed and taken serious I've given my phone a complete reset up and had to look for option to get some apps working that didn't work with 4.3. Anyway I've given my phone a even harder workout than normal, which is already a really heavy workout and my battery is only down to 50% so far! The equivalent of 1 and a half normal battery's, and the use I've given it just today, thats very impressive.