Abstract: A lawn mower includes a seat, a front mounted cutting deck, and at least a first cutter bar enclosed in a first cutter housing rotatable about a first vertical axle and a second cutter bar enclosed in a second cutter housing rotatable about a second vertical axle. The lawn mower further includes a hinge mechanism for connecting footplates to the lawn mower, a pivot support arm for connecting a steering wheel to the lawn mower, a movable arm for lifting the lawn mower to an upright position, the first and second axles being spaced from each other by a transversal distance.

Abstract: A battery pack may include a plurality of battery cells, a cell retainer and a heat exchanger assembly. The cell retainer may define a plurality of cell reception slots configured to retain respective ones of the battery cells. The cell retainer may define an enclosure that fixes the battery cells and is not penetrated by any cooling apparatus. The cell retainer may be in thermal communication with the battery cells to transfer heat away from the battery cells. The heat exchanger assembly may be in thermal communication with the cell retainer and external to the cell retainer to at least passively transfer heat away from the cell retainer while the battery pack is operated in a discharge mode. The cell retainer may include a thermally conductive material capable of transferring heat to the heat exchanger assembly and also storing at least some of the heat.