Techorbit Replacement Battery for dell Laptop: Inspiron, D820, D830, D531, M65, 312-0393,312-0394,312-0402,451-10308,451-10309,451-10326,451-10327 (7200mah 11.1v 9 Cell Replacement Battery) Colour: Gray Ratings: 7200mAh, 11.1v , 9 Cell Powered by High Quality Cells Dimensio(mm): 207.5*82*22.2 one year warranty