[_ea1k]

Lithium Ion battery cells right now cost ~$100USD/KWh and are good for approximately 1000 cycles. That works out to ~.10USD/KWh of provided capacity, which is too expensive, but not "orders of magnitude" too expensive. Obviously there are a lot of additional costs, but I don't think they add up to making them orders of magnitude too expensive either. For perspective, Natural gas comes in at ~.025USD/KWh here.

There is also some evidence that cycle count may improve on cells in the near future as prices fall. a 5x improvement in cell lifespan would make a huge difference.