Alliboo 9 Cells 11.1V 7800mAh for Dell Precison M4600 M4700 M6600 M6700 Laptop FV993 PG6RC R7PND 0TN1K5 New Laptop Notebook Computer - 12 Months Warranty Batteries capacity: 7800 mAh | Chemistry: Li-ion | Voltage: 11.1 Volts | Cells: 9 | wHr: 86.6.100% Customer Satisfaction. Commercial Grade Laptop Batteries for Dell Precision M6600 Series are custom manufactured to be 100% compatible and optimized for your Dell Precision M6600 Series laptop. Dell Precision M6600 Series High Performance notebook battery utilizes high quality grade "A" cells for higher performance longer life and more reliability. battery for Dell Precision M6600 Series are environmentally friendly and certified by RoHS to be free from mercury - lead - cadmium - PBDE and PBBs. Dell Precision M6600 Series High Performance meets and/or exceed OEM specification and will not void your original manufacturer warranty.