512MB STICK For HP-Compaq Presario Notebook Series 1100 1110 1500 1500AP 1500AU 1500CL 1500SC 1500TC 1500US 1501AP 1501CL 1501LA 1502LA 1502SC 1503AP 1504AP 1504TC 1505AP 1505EA 1505TC 1505US 1506AP 1506T 1506TC 1507AP 1507EA 1507TC 1508AP 1508EA 1508TC 1509AP 1509AU 1510AP 1510AU 1510CA 1510EA 1510T 1510TC 1510US 1511AP 1511TC 1512AP 1512TC 1513AP 1514AP 1515 1515AP 1515EA 1516CA. SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory. Genuine A-Tech Brand. 512MB STICK SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq Presario Notebook Series. (See Compatibility List Below)