ACCESSORIES:BATTERY

Question

I HAVE 3 YEARS PERFORMANCE SERVICE PLAN .PSP EXPIRATION DATE:5/26/08 BRAND:SONY COMPUTER. SERIAL#3302234. PRODUCT TYPE:FS660/PM. MODEL:VGNFS660.SKU 7127003.PSP NUMBER:2443734562.NOW CAN I ORDER BATTERY FOR MY LAPTOP ?IS THAT MY PSP HAS COVER? THANK YOU FOR YOUR HELP.