Powerful 36v battery for powerful pickupthe 36v battery provides powerful pick up performance across both hardfloors and carpets for ultimate versatility up to 30 minutes of run time means that you can cover multiple cleaning tasks on just one chargecordless and rechargeablethe upright unit is cordless for safer and easier cleaning around your home when its time to re charge the battery level indicator will illuminate red until the unit is fully charged when the 5 green lights will illumina