sentences:  On October 3, the U.S. enacted the Energy Improvement and Extension Act of 2008 as part of the Emergency Economic Stabilization Act of 2008.The legislation provides tax credits of $2,500 plus $417 for each kilowatt-hour of battery capacity over 4 kilowatt-hours, up to $7,500 for cars under 10,000 pounds, $10,000 for larger vehicles under 14,000 pounds, $12,500 for bigger trucks under 26,000 pounds, or $15,000 for larger trucks and equipment.The tax credit will be phased out two calendar quarters after the first 250,000 such vehicles are sold, down to 50% for the next six months and 25% for another half year after that.