BuyBatts 9 Cell Battery Fits Dell Studio 17, 1735, 1737, PP31L, KM973, KM974, MT335, PW823, PW835, RM868, RW835, 312-0712. Notebook Laptop Portable Computer Replaces standard 6 cell battery with more run time Item Type: This item is an extended capacity 9 cell battery. This battery is physically larger than batteries with fewer cells. Please compare the specs to determine if this battery will be larger than your original. Capacity Rating: 6600mAh; 73Wh Voltage Rating: 11.1V Battery Cells: 9 Cells