There is a battery watch/widget that will show you draining, when, how much, how long. Called battery monitor widget. 
Can also try using Juice Defender, it does help. I normally keep my data off unless I need it, or in a 3g or HSPA+ are and need it. I use WiFi at home.
Using the phone def drains it quickly...price we pay for such a beautiful screen...but I can live with it.
				
			Can also try using Juice Defender, it does help. I normally keep my data off unless I need it, or in a 3g or HSPA+ are and need it. I use WiFi at home.
Using the phone def drains it quickly...price we pay for such a beautiful screen...but I can live with it.
	