Got my 4000 battery on Friday. I was excited to get it. I've used Seidio extended batteries on my last 3 phones, so I am used to the extra thickness of the phone. Personally, I like the heftier feel in my hand which makes the hand grip the phone better. Had the 3500 in my old Evo so the new battery doesn't feel much different.
I am disappointed with how the cover fits. There is a noticeable gap at the bottom of the phone, and I can see tiny gaps along both sides. The top fits good. I am going to contact Seidio Monday to see if they will send another cover. I hope Seidio replaces the battery cover because the gap at the bottom is a deal breaker for me. Not using the new battery until I get a new cover.
I also noticed there isn't a hole for the mic which concerned me, and the power button is a little hard to push. Glad to hear this hasn't affected the phone volume/quality. My 3D volume/call quality is not as good as my Evo 4G, so I was concerned about the missing mic hole.
My existing battery life does ok, but I really need more power. Once I get to use it, I am hoping the 4000battery will have longer battery life than my old 3500. Let us know how long your battery is lasting with what kind of usage. Thanks.
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