I assemble and till with the Ryobi 40V Rear Tine Tiller kit model RY40720. There are four 6 Ah batteries in this 165 pound tiller and I was glad for the transport mode (tines not spinning) and reverse to help move it around. Assembly was straight forward with only a couple minor differences from the instructions to the actual hardware. All the assembly tools needed are included. It produced very fine dirt from weedy turf so I was happy with the results. This is so so much nicer than dealing with gas, oil, exhaust, and engine racket. I was quite surprised how quiet this is. I did 600 square feet with one pair of batteries going from four bars to one and the other pair remaining at full charge. I think you could get about 1500 square feet on all batteries. It took just over an hour to charge a pair of batteries from one bar to full.