My Ego mower was mowing fine and then after about 10 minutes it shut off. When I restart it it starts up fine but loses power in a seconds. No grass or obstructions in it. Tried all 3 of the batteries I have (all fully charged). I have been on hold with customer service for almost 4 hours. Also "presses one to receive a call"...but noone is calling me back!!!Has anyone experienced this? My mower is 3 years old and I have never had a problem.