I got the LB6151. It comes with a smaller battery. Claims 75 minutes on a lower speed. 10 on turbo paint peeler mode.
but I have big lawnmower batteries as well that fit. Heavy but with the strap it is good. Probably 30 minutes if turbo. Couple of hours of regular.
I can do most of my yard in an hour with my old blower. This should be faster.
also, I could have saved $30 with a Mass Save coupon but I didn’t realize it until after I bought it. Still a good deal