I believe the correct expression is ‘Pedal Assist’ not battery assist. If you don’t pedal you don’t move! I’ve been mt biking over 30 years and at 72 my leg strength and cardio capability ain’t what it used to be despite great effort to the contrary. Now I can go up with you younger guys without excess fatigue and enjoy the thrill of the ride down. Took 20 years off me, just wish the balance and reaction time were what they used to be. Now I enjoy the uphill climb and can still get a maximum heart rate workout. Ya, I earn my turns!