X301A1 X301U X401 X401A X401A1 X401U X501 X501A X501A1 X501U. ASUS X501 Series ASUS F301 F301A F301A1 F301U F401 F401A F401A1 F401U F501 F501A F501A1. Battery type: Li-ion. Cell: 6 Cells. A31-X401 A32-X401 A41-X401 A42-X401.
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