I don't worry about the battery recycle so much - I'm more concerned about what will happen with those super heavy e-bikes when the owners decide the cost of replacing the battery is too high and they just dump them. They will have no use as regular bikes because of the difficulty pedaling 40-50-60lb beasts. If you spend $40k+ for an electric car, you're more likely to replace the battery when the car needs it. Maybe e-bikes from commercial builders should consider a lease model.