The FLEXVOLT 4-1/2 in.-6 in. (115 mm.-150 mm.) Grinder with Kickback Brake is maximized for power and durability. It delivers 13 amp power as compared to the D28144N with the portability and convenience of cordless through revolutionary FLEXVOLT technology by DEWALT. The DCG414T1 comes with one FLEXVOLT 20V/60V MAX* battery and fast charger.