Sorry to re digg this thread but Yesterday I was given the Opportunity to get an EVO 3D battery which I believe is 1800 mAh. The battery fit perfectly fine, Although mine had a hard time going into the EVO, and was impressed.
Since I got the phone I would only get from 10AM till about 11PM when I started to get the low battery warning. My usage is obviously not super high but before I get to bed at around 11-12 I like to browse the forums and view some videos which would only let me go until about 12 or 1AM before I need to charge.
So I have no problem getting through the work day at all.
Yesterday I was given an EVO 3D phone to box up and ship out due to a broken screen. We get to keep the batteries and they just get recycled. So, I took the battery and stuck it in my Titan to see what it would do. The Battery was fully charged at about 11AM which was when I took it off the charger.
Flash Forward it is now 9:30 PM the Next day and the phone is showing 8% battery left with 3 hours to go.
The phone shows the last charge at 1 day 9 hours. Thats 33 Hours of use!
I still did the norm which was text, tweet, update Facebook, take a few pictures, listen to some music on my 5 minute commute to work (lol), mess with skydive, check the forums, watch a few vids, and download music on zune pass.
Overall, I am 200% happy with this Battery and 200% happy with the phone now! If you have any way of getting an EVO 3D battery cheap I say do so! Plus its OEM so no issues whats so ever.
I don't know if its because the phone was still fairly new but I was having trouble getting 12-15 hours out of this phone. Coming from a black berry that I could easily get 2 days out of I was kinda disappointed. The battery on the EVO wasn't old or new, the phone was bought about 3 months ago so it had some time on it. But damn, 30+ hours is Amazing IMO. Granted if I was a power user like I used to be then I might still get 20+ hours which is nothing to cry about.