BRTONG Battery Replacement for DELL Inspiron 1318, XPS M1330 (9-Cell Equivalent) Replace PN:312-0566, 312-0567, 312-0739, 451-10473, 451-10474, PU556, PU563, TT485, WR050 Compatible Models: Dell XPS M1330, 1330 Compatible part number: 312-0567, 312-0566, PU563, TT485 Battery type: Li-ion; Capacity: 4800mAh/53WH; Cells: 6-cell; Voltage: 11.1V Operation time for standard batteries: Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12-month hassle-free warranty