An ultrasonic surgical assembly for connection to an ultrasonic surgical handle includes a reusable exterior body defining an internal compartment and having a connection operable to removably secure the body in a body-holding compartment within the ultrasonic surgical handle, a reusable cordless ultrasonic-movement-generation assembly disposed in the compartment and having an output couple removably attachable to an ultrasonic waveguide and operable to impart ultrasonic movement to the ultrasonic waveguide, and a reusable and rechargeable battery disposed in the compartment and electrically connected to and powering the assembly.