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Research Firm Claims Most cars still cost more to charge than to fill up with gas
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
If you are plugging into an outlet in your garage (level 1) you are only charging up 3 - 5 miles per hour. Putting in a 240v 40 amp (level 2) will get you 20 - 25 miles per hour i.e. a complete recharge for current batteries in 12 hours.