Additionally, the S21HB sports extra large rear wheels and an advanced Terra Phase Brushless high-performance motor.
The S21HB's 21" 3-in-1 cutting deck offers mulch, side discharge or rear bagger options while height adjustment system allows for cutting levels between 1.5” and 3.5”. Its removable sealed lead acid battery typically allows the S21HB to charge the entirety of a standard lawn on a single charge while a full recharge of the included battery usually costs about 10 cents per charge cycle. Meanwhile, the S21HB's LED battery level indicator allows users to see at a glance how much battery charge remains.