Electric lawn mower cordless lawn mower series mountfield princess cutting width 34 cm max lawn area 250 m min cutting height 25 mm max cutting height 75 mm cutting height steps 6 positions engine make mountfield battery voltage 36 v battery capacity 26 ah type of battery li ion charging time 180 min discharge rear discharge grass box capacity 35 litres front wheel diameter 140 mm rear wheel diameter 170 mm start system electric start featu