Hi been researching battery lawn mowers and I'm down to 2 including the Ego 80v self propelled. I'm not concerned about how long a battery will last to cut my lawn initially. I'm more concerned about how long the Ego will last. I'm willing to spend the money on the Ego but I want it to last. I've had gas powered mowers and they do last 10 years with maintenance and some repairs from time to time. How's the quality of the Ego? Will it last for a period of time or will I have to replace it in 5 years? Thanks!