Makita delivers corded grinding performance without the cord with the 18V LXT Lithium-Ion Brushless Cordless 4-1/2" Cut-Off/Angle Grinder (model XAG03M). It's powered by a Makita brushless motor for longer run time, increased power and speed, and longer tool life. For the most demanding applications, Makita's exclusive Automatic Speed change Technology automatically adjusts speed and torque during operation for optimal performance. The 18V LXT 4.0 Ah battery provides 35% more run time per charge than the BL1830 (3.0Ah) battery, yet it charges in only 40 minutes for less downtime and increased productivity. The XAG03M is ideal for grinding, cutting and sanding a wide range of materials including tile, concrete, pipe, conduit, and more. The 18V LXT 4.0Ah battery (BL1840) is compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool.