Even though this is dated(
), I thought I'd throw this out there for anyone else interested, the Trident Electra
will fit an extended battery (and most kits will actually come with an included battery.) I've got one for my droid x2 and while the case is quite thick (about 2x thickness of a normal Dx/dx2) it is a BEAST. I really like the combination of the hard shell interior and silicone exterior, and I've even accidentally tested the durability by leaving my phone on top of my car after getting gas. Phone fell off as I was driving down the street and all it did was scuff the silicone a bit on one corner. Definitely worth the investment IMO, but I would try to get a case on Amazon or equivalent as Trident wants 80 bucks new! You can find it for half that elsewhere!
Phone: Dx2 CM7 Beta