The black and decker clm3820l2 lawnmower has 2 x 36 volt lithium ion batteries for longer runtime of up to 30 minutes the 38cm robust deck is ideal for mowing lawns up to 600m and the grass box has a large 36 litre capacity plastic grass box that is robust and convenient it has 6 settings for height adjustment and a single lever can change the height of the cut from 30 80mm the integrated carry handle makes the mower easier to lift and transport whilst the folding handles allow the mower to be