[hayden55]

"They never show the cost of the lead acid batteries, that last just 350 cycles and require a large number."
Also the number you quoted is the 80% depth of discharge life cycle for deep cycle batteries. Some even quote 400 cycles at this number (Odyssey warranty), and it goes up a lot the less you deeply discharge it.
Yeah Lead acids are the worst in cycle life. I know panasonic quotes up to 40,000 cycles for discharge between 30 to 70% dod for their Telsa supplied 18650's li-ion cells which is fantastic. Even if you convert it down to I think 92% depth of discharge this still gives you 750 cycles. And even when they are deemed to low ah capacity for a car they are friggin fantastic purchases for diy power walls of all sorts.
Life cycle example my 2010 Prius has 140k miles, original 12v battery, and original nimh battery.
But replacement cost for the battery pretty low, 600$ now to replace the prismatic cells inside the pack with refurbished units and I think brand new cells not even refurb ones are only 900$ (~32$ ea) from panasonic now.
I think the reaction to electric cars can be a little dramatic.