SpecificationBattery type: Li-ion Voltage: 14.8V Capacity: 2200mAh/33Wh Cell:4 Cells recharge cycles 500 Operation time: Around 1.5-2.5hours Compatible P/NCompatible Dell GXVJ3 HD4J0 HD4J0 K185W KI85W M5Y1K M5YIK WKRJ2 VN3N0 451-BBMG