I am having really bad battery drain aissues after updating to iOS 4.3xx.
I am on a 3GS with the latest iOS update.
Last night I charged my iPhone to 100% then took it off the charger and sat it on my nightstand. Never touched it again until this morning when I checked it, it was down 17% overnight. Used it to check my mail, stocks and news. Maybe 3-4 mintues and it went down another 6%!!!



I haven't downloaded any new App's or changed anything on the phone from when I was getting really good battery usage before updating the iOS.