Egoway Battery for Dell Precision M6600 M6700 M4600 M4700, fits FV993 J5CG3 1C75X 3DJH7 97KRM FJJ4W KJ321 RY6WH R7PND 9GP08 FVWT4 PG6RC V7M28 0TN1K5 X57F1 312-1176 312-1177 312-1178 331-1465 Battery type: Li-Polymer battery; Voltage: 11.1V; Capacity: 6600mAh; 9Cell. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery; CE-/FCC-/RoHS-Certified for safety. Operation time for standard batteries(eg, 4400mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. Warranty: 12 - month warranty; 24 x 7 email support.