Specification: Battery type: Li-ion Voltage: 11.1V Capacity: 7800mAh Cell: 9Cells recharge cycles： 500 Operation time: Around 3.5-4.5 hours Compatible Models： For Dell Precision : M2400 M4400 M6400 M6500 Compatible Part Numbers： 312-0873 8M039 C565C DW842 KR854 J012F.
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