The 42 volt lithium-ion battery is built right into the Doodle Scrub and Doodle Mop handle. Up to one hour of constant run-time. Noise reducing and corrosion free base clip securely connects to the machine base. Ergonomically designed handle trigger keeps the switch and button safe and reduces user fatigue. Built in battery management safety system monitors each cell for temperature and voltage. UL, CSA and CE Certified.