Greenworks PRO 21-Inch 80V Cordless Lawn Mower, Battery Not Included GLM801600 Never stop cutting. Up to 60 minutes of run time with fully charged 4.0AH battery Battery and charger not included Greenworks brushless motor provides your tool with longer run-time, more torque and more power. This leads to less wear and tear, extending the life-time of the tool Smart-Cut Technology improves performance and extends run-time 21-inch steel deck with 3-in-1 design for mulch, side discharge or rear bag capability Battery and charger sold separately, compatible battery and charger models GBA80200, GBA80400 and GCH8040