I’ve had my AEG Fusion battery powered mower for nearly two years and it’s been great. Just lately it seems to lose power when hitting higher or thicker grass whereas before it used to increase revs to cut through the thicker grass. I’ve done the increase height of cut, decreased width of cut and it doesn’t matter if the batteries are freshly charged or not. It never cuts out completely you just have to stop, lift the front wheels and let the revs build up again before proceeding. Anyone have any ideas? Mid north coast NSW Australia