Great Reviews!
Amazon.com: Sprint HTC EVO 4G 2x1800 mAh Battery Longer life than OEM+ Wall Travel Dock USB Charger also for Verizon Incredible Droid Touch Pro2 My Touch Slide: Cell Phones & Accessories
You won't be disappointed. It's a huge improvement over the stock battery. I've read some of the reviews from Dinc owners who purchased this product and let me say that all were pleased! I can vouch for this as I've tested the battery for a couple of days now and the results have been amazing. The only problems I found was that the battery is supposedly a hair thicker than the stock but, the fitment is perfect! Also, it took about 8 hours to charge the first time for some reason; however, after the initial charge, it only took about 3 hours. I am also rooted and running SetCPU with Perflock disabled. This has allowed me to under clock my CPU to the minimum WHILE the screen is off which also helps to increase battery life. I am able to keep everything on including Wifi/BT/GPS/Sync/Autobrightness...Enable Mobile Data Always On is checked etc. I'll try to take pictures of my up/awake time but, let me tell you that I was getting almost 10hrs of awake time and 35hrs of up time with just a little bit under 15% battery life left! With little use, the battery could last for days!
Battery + SetCPU + Bump charge = :icon_ banana:
***Edit
I forgot to mention you can just get 1 battery for about $15 I believe. This can be purchased at htcexpress.com
Note: It's not the actual htc company but, I'm not complaining as the product is high quality!
By the way, I just snapped a picture of my screen to show you guys where it's at right now. I'll post up another one as an end result soon.