ENERGY+ is the number one name in replacement batteries for the computer industry. This is because Fedco Electronics offers the highest quality batteries at competitive prices. ENERGY+ battery pack uses the highest quality battery cells from the leading cell manufacturers.This product is designed for the following Dell systems: Inspiron 2500 Series;Inspiron 2600 Series;Inspiron 2650 Series;Inspiron 3700 Series;Inspiron 3800 Series;Inspiron 4000 Series;Inspiron 4100 Series;Inspiron 5000 Series;Inspiron 7500 Series;Inspiron 8000 Series;Inspiron 8100 Series;Inspiron 8200 Series;Inspiron SmartStep 100N Series;Latitude C400 Series;Latitude C500 Series;Latitude C510 Series;Latitude C600 Series;Latitude C610 Series;Latitude C800 Series;Latitude C810 Series;Latitude C840 Series;Latitude CP Series;Latitude CPi Series;Latitude CPt Series;Latitude CPx Series;Latitude CS Series;Latitude CSX Series;Latitude M40 Series;Latitude M50 Series;Latitude PP01L Series;Latitude PP01X Series.For a complete compatibility list please refer to the original manufacturer's web site.