Super-Capacity Li-ion Battery For Acer Aspire 5520 5720 5920 6920 6920G 7520 7720 7720G 7720Z series replace for AS07B31 AS07B41 AS07B42 AS07B72 CONIS72 series Ac Laptop Notebook Main Battery [ 4400mAh 6 Cells] Super-Capacity Li-ion Battery