SKYVAST 9-Cell 11.1V 7800mAh New Laptop Battery for Dell Latitude E5400 E5410 E5500 E5510 KM668 MT322 RM649 PW640 WU841 Battery type: Li-ion; Voltage: 11.1V; Capacity: 7800mAh; Cells: 9-cell Fit laptop models: Dell Latitude E5400 E5500 E5410 E5510 Compatible P/N: KM668 KM742 KM752 KM970 MT186 Exchange/Refund Policy: Free exchange/refund within 12 months This battery larger than 6cell battery. Please check it before buying.