“What do you get with the ‘New’ 400ST?” is the question. Lithium-Ion Technology is the answer. No Power Cables, No Petrol Engine or Engine Noise. 18” (46cm) Width of Cut, Steel Deck, Twin Blades, Catch or Mulch. Up to 1hr Run Time from the 4AH Battery Powered 750 Watt Motor. The neighbours won’t even know you’ve been in the garden.