It’s here: The Phottix BG-1100D Premium Series Vertical Battery Grip for Canon 1100D digital cameras. This battery grip can hold two LP-E10 batteries to offer double-length shooting time. It is also equipped with a vertical-grip shutter button to make shooting with the camera in a vertical position just as comfortable as shooting horizontally.
See you local Phottix retailer or check it out in the Phottix Online Store.
Battery Grip capable of holding two LP-E10 rechargeable batteries