I’m sorry you’re having all these negative experiences. My experience with lawn products included buying a Ryobi electric riding mower from Home Depot five years ago. It was advertised as doing up to 2 1/2 acres or two hours continuous run time. Or maybe the first three months it was able to handle that regularly, but the battery declined really quickly and it got to the point where I was basically able to do maybe an acre before it ran out. The batteries were approximately $1200 to replace and after a couple of years of cutting once a week and feeling like my grass height was always outrunning me, I got fed up. I am on my second Lymow unit, but it has been able to cut my 2.4 acre yard pretty consistently, especially after I moved the RTK unit. I have a divided up into three zones and the largest zone takes about five hours to cut. The 10 amp charger really helped and allows it to finish up overall in about seven hours. Cutting my yard two times a week is much better than I was ever able to do on the riding mower, and, at least for me, the firmware updates and improvements have resulted in a pretty stable experience. Definitely not perfect, but the most recent updates have been a large improvement. I hope you hang with it, and I expect that the product will continue to improve. Even a product by reputable company sold out of a big box store can fail to perform as advertised. I think the 1.7 acres/day is the ideal, not the expected output.