Makita delivers corded grinding performance without the cord with the 18V LXT® Lithium-Ion Brushless 4-1/2 in. Cut-Off/Angle Grinder with Paddle Switch (model XAG10M). 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. For added convenience, the XAG10M has an electric brake that stops the wheel in 2 seconds or less upon release of the paddle switch. The 18V LXT® 4.0Ah 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 XAG10M is ideal for grinding, cutting and sanding a wide range of materials including tile, concrete, pipe, conduit, and more. For improved tool performance and extended battery life, Makita created Star Protection Computer Controls™. Star Protection is communication technology that allows the Star Protection-equipped tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over-discharging and overheating. For increased versatility, the tool can also be powered by Makita 18V LXT® and Compact Lithium-Ion batteries with the Star Symbol™ on the battery indicating Star Protection inside. 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.