I (like many others) have been having battery life issues since the upgrade to Kit Kat. I've taken as many steps as I can to reduce battery drain (disabled all factory apps I don't use; make sure location is always off; downloaded snapdragon battery guru), but it seems that the majority of my battery drain is when I am using WiFi. For example, today as soon as I took the phone off the charger, I disconnected from WiFi at 100% battery life. used the phone casually throughout the day, and when I got home I was at 75% battery life. I connected to my WiFi, and now 3 hours later with very minimal use, I am down to 62%. Any thoughts on why being connected to WiFi (not constantly searching for a signal, but actually being connected and using WiFi) would drain the battery like that?