iPhone 4 Monsters Inc - Boo Phone Case (Limited Edition)
MOTA iPhone 4/4s Extended Battery Case - Pink - TW8342 - Shoplet.com
iCover iPhone 4/4S Rubberized Protective 1900mAh Battery Case - Black | BuyDig.com
Exera Modular Detachable Battery Case for iPhone 4S 4 - White — Beach Camera
DX-4 Plus Battery Case (2400mAH) - iPhone 4/4s | myunu
PhoneSuit® iPhone 4 & iPhone 4S Battery Case
mophie iPhone Battery Cases | Groupon Goods
iContact iPhone 4/4S Battery Case - Black (IC-BC100)
GENUINE Mophie Juice Pack Air Battery Case for Apple iPhone 4 S 4S White 1500mAh 810472020068 | eBay
mophie juice pack air (White) iPhone® 4/4S protective case with built-in rechargeable backup battery at Crutchfield
Amazon.com: MFI-Apple Certified - ibattz Mojo Vogue Removable Battery Case for iPhone 4 and 4S White 1700mAhX2 fits all version of iPhone 4S/4 : Cell Phones & Accessories