wrote in :

I would take any number of seats, 4 hour endurance, 30 minute
recharge time, a guarantied 6 year battery life, and a battery
replacement cost of less than $10,000.

Battery life is going to be dictated by number of cycles,
not time. And, I would imagine there would be a 'black box'
recording battery use for warranty purposes. At least that's
what I'd do if I were selling them.

Brian
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