Moreover, I read an article about the Nissan Leaf, after about 3 years the battery will only keep about 80% of its charge and continue to diminish. A replacement battery is over $18K. Another note if we were talking about a completely electric engine, how long would it take it recharge to full.
That's weird, but it seems that there are some differences within the industry. As I wrote before, some group tested 10 year old Priuses and found that the batteries were behaving very, very similarly to how they did with newly manufactured models. Toyota also quoted the cost of battery replacement as being somewhere in the thousands, but I'm pretty sure it was $5,000 or less. That's expensive, but it's way less expensive than $18,000! Not sure what Nissan is up to.
If you want to see a 100% electric vehicle, look at Tesla Motors. They have two models out now, the Roadster and the Model S. They're currently developing an "economy"-type car (code name Blue Star), a crossover SUV (Model X), and if I remember right, a van. Those are some beautiful cars.
The Roadster and high-capacity Model S have a travel range of around 300 miles on a full charge (I believe the official line says 340 miles). They take three hours to reach a full charge, but I'm not sure how long they take to go from, say, low to half charged (which would be a lot faster - the battery "top off," charging past 80% or so, is what tends to take the longest).
So this isn't the type of vehicle you're going to want to take for long interstate travel trips, and until they can develop batteries that you can swap out (or faster charging methods), they may never be. But for regular day-to-day driving, these are very capable cars. It's only going to get better from here, and that's pretty exciting.
And a note for the patriots... Tesla is 100% an American company. Check them out. http://www.teslamotors.com/