Think of the Nokia Camera Grip as a snap-on shell for the Nokia Lumia 1020, designed in a way to make the handset feel more like a camera when in use. The accessory has its own large button that rests right on top of the 2-stage shutter key, easing the process of focusing and composing each picture. In addition, the Camera Grip holds extra juice - 1020mAh is the exact capacity of the case's built-in rechargeable battery, which we assume would boost the Nokia Lumia 1020's longevity by about 50%. A threaded receptacle on the side of the accessory allows the smartphone to be mounted on a tripod.
The Nokia Camera Grip, available in white, black, and yellow, will be released alongside the Lumia 1020 later this month.
source: Nokia via phonearena