This light weight, easy to use tool is the first angle grinder of the MAKSTAR series models this Makita Grinder features overload and accidental start protection and can use wheels or discs for mains grinders. With a 22-minute charge time with the air cooled Makstar Optimum Charging System and Lithium-ion batteries that have greater life spans than their Ni-MH or Ni-Cad counterparts giving 430% greater run time. The Lithium-ion's 40% weight saving means 18-volt power can be obtained by a battery that weighs the same as a 12-volt Ni-MH battery.