An ultrasonic assembly (2300) removably connectable to an ultrasonic waveguide (2504) of an ultrasonic surgical handle (2301), comprising: a cordless ultrasonic-movement-generation assembly (2303) having a generator (2404), an ultrasonic transducer (2406) electrically coupled to the generator (2404), and an output couple (4206)； and a shell (2304) housing therein at least one of the generator (2404) or the ultrasonic transducer (2406), the shell (2304) having a securing connection (4204) shaped to removably connect to the ultrasonic surgical handle (2301), wherein the output couple (4206) is operable to impart ultrasonic movement to the ultrasonic waveguide (2504) when the securing connection (4204) is connected to the ultrasonic surgical handle (2301) and the waveguide (2504) is connected to the output couple (4206)
