Lenmar LBZ383AS Replacement Battery for Asus U50F Laptop Computers: * Fits: Asus U20A Series, U50A Series, U50F Series, U80A Series, U81A Series * Replaces: Asus 07G016971875, 70-NUP1B2100Z, 70-NV61B1100Z, 90-NVA1B2000Y, 90R-NUP1B2000Y, 90R-NV61B2000Y, A31-U80, A32-U50, A32-U80, A33-U50 * 10.8V/4600mAh * Lithium-Ion * 1-year warranty