The Clarke auto scrubber rental are reliable and durable and have the features you need to increase the productivity and efficiency of your cleaning program. They both have built-in chargers. The batteries on these autoscrubbers last for approximately 4 hours and can be recharged at any level of power. An extra set of batteries is included with your rental. These walk-behind scrubbers also have curved urethane squeegees with reverse pick-up. 20-inch pads are avalaible for purchase in a variety of styles. Sometimes called a concrete floor cleaner