Hello, I am looking to upgrade the battery in the Vzw Droid Incredible. Gorilla Gadgets has a 3500mAh battery on sale now for $26: 3500mAh HTC Droid Incredible Extended Battery with Back Plate Have people noticed a good uptick in performance? Is this one of the better ones to get? Are there other batteries I should be looking at? If they really are only increasing the size by 5-6mm, that's fine with me, I think. I'll have to purchase a new silicone case, but that's fine. Thanks!