Product details:
M18 Fuel; 7-1/4 inch Circular Saw Kit; Powerstate Brushless Motor; Provides Up To 3 Times Longer Tool Life; Red Link Plus Intelligence; Maximizes Performance; Red Lithium XC 4.0 Battery Pack Offers Up To 4 Times More Runtime; 20 Percent More Power and Up To 2 Times More Recharges Than Competitive Batteries.