The cobra rm4140v rear roller mower has a 16 inch cutting width and uses a samsung 40v 4ah lithium ion battery. This push cordless roller mower has superb features including the led display power indicator on the handle, fabric with hard top grass box, full width rear roller single lever height adjuster.all the cobra 40v cordless garden machinery uses the same lithium ion battery and battery charger. The battery powered 40v range includes hand propelled and self propelled four wheel lawn mowers, rear roller lawn mowers and hand held garden tools including a line trimmer, hedge cutter and chainsaw.the full width rear roller provides a traditional striped finish to the lawn. The roller also allows you to mow right up to the edge of borders or paths.the cobra rm4140v uses a single lever located on the back wheel to set the cutting height through 7 settings from 20 – 75mm. These adjustments offer a very low cut on the lawn during dry conditions when the best cut possible is obtained, through to the highest setting for mowing longer grass. The large 50 litre capacity of the grass box means you can spend more time mowing and less time emptying the box. It also has a bag full indicator so you know when to empty it.the cobra rm4140v includes a 4ah 40v lithium battery and a 40v battery charger.specificationsmodel rm4140vtype cordlessbattery 1 x samsung 40v lithium ion 4.0ahstarter push buttondrive pushcutting width 41 cm 16 inchcutting deck material steelheight of cut single levercutting height settings 7 from 25 75mmgrass box material fabric with hard topgrass box capacity 50 litresgrass bag full indicator yescharge time approx 90 minutesrun time up to 30 minutes from 1 charge in ideal conditionscomplete with 1 x 4ah battery and 1 x battery charger warranty manufacturer's 2 year home owner