with shutter,same functions as original grip,use 1 or 2 LP-E5 Lithium and six AA batteries. The Power Grip is powerful, versatile, and comfortable. It extends the battery life of your DSLR camera, it offers a secondary shutter release button for vertical and portrait shooting, and includes special function buttons for more shooting options. Accessory1.AA battery slot 2. Li-ion battery slot 3. ...