Look to China for mass production of cost effective batteries, not Tesla... firms like EV West help me demystify the true state of maturity of this market http://evwest.com/catalog/
That's what I'm afraid of. That China will push a "race to the bottom" not on just prices per se, but on lower prices with poorer quality batteries that hold much fewer charges and degrade faster, making you want to dump your EV battery after 3 years. But everyone will be too focused on their promotion of "cheap long range EVs" to notice.
This is why EV's have a horizontal firewall, to protect the occupants from the batteries. Plasma burns are a big concern for the guys building and tuning drag racing and hill climbing EV's. (Electric vehicles are wonderful for acceleration sports but currently hopeless for any sort of sustained high speed/endurance racing).
Revolutionary idea ... make batteries replaceable. We had it back in the days. You could just remove the old batteries and put the new ones.
Insert the typical disclaimer here about how they only did that demo to get some California ZEV credits and how they're not moving forward with actually implementing it for end users
and the disclaimer about how the only semi-viable battery swap company went bankrupt and shut down: