I paid about 800 dollars for 80 cells. But they are going to last more than 500 cycles probably 1500 to 2000. Plus, they are ideal for high voltage application, since I run at 66 volts and I still have a solid 8 amp hours.
I don't blame the engineers for going without the LifePO4- especially in a production situation. These cells are hard to come by.
@Lock- they do talk about regeneration, at least on the video from the President of the company. Listening "between the lines", it may be adjustable too as they say there are 19 riding modes. This bike seems quite sophisticated, I would love to see one.
GIVE ONE TO JAMIE ON THE MYTHBUSTERS TO SHOW!
Edit: cost of batteries