STIHL RMI 422 Cordless Lawn Mowing Robot Fully automatic mowing robot for medium to large areas. Cuts, chops and mulches like a mulching mower in a single operation. Battery capacity 40 Wh, cutting width 20 cm, weight 10 kg Technical data Max. mowing area 800 m2 Max. slope 35 % Cutting width 20 cm Min. cutting height 20 mm Max. cutting height 60 mm Mowing time 16 h Max. cutting time per 100 % battery charge 40 min Nominal power 45 W Nominal implement speed 4450 U/min Battery type Li-Ionen Weight 9 kg