Extended Batteries?

[rock22]

I got my first smartphone several days ago. I got a Samsung Galaxy S2(AT&T). I love it! Great camera, fast, sleek and better than my brothers Windows Phone and peoples Iphones . Only thing I don't like is the battery.

It barely lasts me a day. When I get home it is pretty much dead. I just listen to music and play some games between classes. I read that the current update for it drains the battery or something.

I use the "battery defender" app, and turn wifi and 3g off, when I'm in class.

So is an extended battery worth it? Or, have any other advice for saving battery/first time smartphone owner.

Thanks.

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