With EB625152VA the original Vibrant back cover can't close
For anybody that is reading this thread, I just tried EB625152VA Epic Touch 4G's 1800mAh battery as many people here have suggested. It fits the socket and battery contacts perfectly. However, it is slightly thicker than the original EB575152LA 1650 mAh which prevents the battery cover from closing properly no matter how hard I tried to force it in. There are back covers that can accommodate this battery and even larger, but for what it's worth, I don't think the additional 150 mAh is worth it.