So I just got the extended battery. I was skeptical at first mainly because I don't know the technical end of how batteries work as far as MaH and so on. So I swallowed my pride and dropped the $70 dollars for the Siedio extended battery. As we speak I'm at 40% battery and I have yet to charge it since I put it in at 9:00pm lastnight where it was at 60% out of the box. I went out lastnight with friends, updated my Facebook, uploaded a few pics from my computer and sent maybe 200 texts and received phone calls. I went to sleep with the phone on and here I am at work with 40% battery. Pretty amazing I must say but I'm still waiting for it to die -_- I never thought id actually look forward to my phone dying haha. To make it all better I'm typing this from my Evo. if you have one of these beast batteries let me know what you think!