How far could the current Prius get on 1 kwhr of energy at say 25 mph-2 miles or so?Ignore acceleration or just fudge it in there(figure about 6 stops per mile). How much capacity will the battery need to get 9 miles? Our current battery is what-1.5kwhr?

It would be nice to be able to go 8-9 miles on 12 cent KWHR electricity.At 2 miles/KWHR-6 cents a mile.At 50 mpg I'm paying about 6 cents/mile right now??Same as I would if I could only go 2 miles perKWHR.Is 3 miles per KWHR more like it for a Prius?

Ok,I'm missing something here.I guess you can go farther than 2 miles on 1 kwhr-right?
What is a reasonable guess for distance per KWHR-it must be more than 2 miles per? I'm guessing that a large part of the advantage is not spewing dirty air into a congested city.Use Nuke,Hydro,wind, or try to scub coal,oil,and natural gas at the power plant to produce electricity.. I'm pretty sure there isn't any practical way to scub out-solidify-CO2- yet, but other grunge can be scrubbed out.
Someone give me a reasonable distance for 1 kwhr in a Prius ?
Thanks.Charlie
PS Yes,it would be nice to be able to retrofit one of these new battery packs, but safe bet they will be waaaay too expensive to bother retrofitting(except as salvage)