Open the RBRfermata Models with quick-release handles Locate two release tabs on the opposite sides of the battery end-cap. Push at the tabs from the top to release the end-cap handles. Move the handles up from both sides. Firmly grip both battery end-cap handles and pull them up to remove the battery carrousel. Models with low-profile handles Loosen the two thumb screws in the battery end-cap until the carrousel can be separated from the housing. Firmly grip both battery end-cap handles and pull them up to remove the battery carrousel from the housing.