Replaces OEM # B31N1842, B31BME1, 0B200-03440000, 0B200-03440000M Fits: ASUS VIVOBOOK 15 K531, VIVOBOOK 15 K531F, VIVOBOOK 15 M513, VIVOBOOK 15 S531, VIVOBOOK 15 S531F, VIVOBOOK 15 S531FA Specs: 11.52V, 3550MAH, 42WHR, 3 CELL Brand New GreenTech replacement battery - 6 Month Replacement Warranty Each product has undergone rigorous testing to ensure the correct voltage, circuit protection, stable current, low self-discharge and CE / FCC / RoHS Certified for safety