Go into settings and about phone. Gingerbread was version 2.3 I believe. Froyo 2.2. The newer Android phones are pretty awesome but with the screen size, they just eat battery life. I like my phone slim and don't want to have an extended battery. My iPhone makes it through a day of very hard use.
Oh, I always keep my wifi on because if you have email or FB on it, it takes more to reach out to cellular than to keep connected to wifi IMO. I keep BT and wifi on constantly. I find that if you want to make it through a day with Android, you just adjust screen brightness and awake time. By awake time, I mean the amount of time it will stay on without input.