did you read the article? you change the battery, so you don't have to wait to recharge it when you are in a hurry. When you aren't in a hurry, you can plug it in. I'm sure you won't lose sleep while the battery recharges between midnight and 7am...
Iraqi car bomb death toll rises to 25 (Reuters)
from the article: Shai Agassi's Better Place electric cars take to the highway