Or - make lower power devices?

The economics are interesting, how much would it cost to make a lower power device with the same capabilities? Say a 100% improvement in battery life? Or how much would a better battery cost? Say twice the capacity?

If it cost $200 to do this for an iPhone (I have no idea) then why is it that companies don't spend this; the answer has to be that consumers are just not that willing to pay.

Or - it's impossible or would cost $2,000,000 or something!

But, thinking about it, if it costs $2,000,000 now wouldn't it be smart to invest in a company with a plan to reduce that to $20?

Oh wait! Intel!