A problem some users experience with electric vehicles is called "range anxiety". i.e. anxiety that the vehicle will not have sufficient range for the task at hand. Recent research indicates that range anxiety ceases to be a problem after 3 months of use. M0re at:
http://venturebeat.com/2011/09/09/range-anxiety-drop-off/
http://venturebeat.com/2011/09/09/range-anxiety-drop-off/