i have a 2007 mac book and i am trying to figure out the model from the information under the battery on of them sa model

These are the locals for the serial# on a MacBook....hopefully one of them will help you find yours....

http://support.apple.com/kb/HT1366?viewlocale=en_US&locale=en_US

Type your serial number into the box in the upper left corner and hit your enter key. This will bring up a page with all the information you want to know. http://www.appleserialnumberinfo.com/Desktop/index.php