The issue I have with doing that is I just purchased the Otterbox Defender case with holster, (I won't put my phone in my pocket) and it would be a real pain to have to swap batteries. My battery life is horrible. I guess I need to do some tweaking or something.
Originally Posted by lotus49
While the battery life on most smartphones is pretty poor, rather than have a fat battery and ugly cover, I just carry a spare charged battery. I need to use it about once a week.
Is there any reason why you wouldn't want to do that instead of using an extended battery?
Just buy a spare battery and change batteries if you run out. That's what I did with my S2 and that approach served me well for two years.