I rode up a mountain yesterday. 12 mile climb, 3800', average 5% grade but higher in places and 15% near the top. I was almost all in the L1 setting, L3 at the top and L0 for the first couple of miles near the bottom where the grade is slight, and for the 12 mile descent. I had 42% battery life remaining at the end of the ride. I wonder if I would have had enough battery to do the climb in L2? On the last 15% grade, I was a little disappointed that I didn't have more speed in L3. I guess that's to be expected as I was only doing 5 mph and the motor doesn't generate that much power at low rpm. I probably only averaged about 1 mph faster on the ride than I would have done on my road bike. It was easier though. The bike handled well on the downhill. I had a squeal from the front brake once. I think the brake pads got too hot, as the descent is twisty and required a lot of braking. Maybe I was dragging the brakes some.