POWER SPECS: Model: 97Wh M5Y0X Extended Li-lon battery; Voltage: 11.1V Capacity: 97Wh/8700mAh; Cells: 9 A+ Cells; This battery is also a replacement battery for 5800mAh / 11.1V / 65Wh / 6 Cells. This 9 A+ Cells battery can lasts longer batter than 6 cells. You can use it safely and buy it with confidence at any time.