Replacement for Max Group Laptop Battery MaxNote 9038, 9055, U-755II Battery Type: Li-ion. Voltage: 14.80V. Capacity: 4000mAh. Color: Dark Grey. Replacement for Max Group Laptop Battery 23-UD4000-3A, 23-UD4200-00, 23UD40003A, 63-UD4024-30, 755-3S4000-S1P1, 755-3S4400-S1P1, 755-3S4400-S2M1, 755-4S4000-S1P1.