This Asus S501 battery is compatible with the Asus A31-X401, A32-X401 battery part numbers and the S501, S501A, X301A and X301U models.

We use the highest quality lithium-ion cells and battery components that run longer, charge faster, and weigh less than cheaper, lower quality batteries. Lower quality batteries are made with inferior cells and parts that can wear out in as little as 6 months.

This Asus S501 battery is 100% compatible with the original battery specifications and is individually tested and backed by a 1 Year warranty.

You can expect about 2 - 3 hours of run time with this Asus S501 battery when new, depending on your energy use. This battery replaces the Asus S501 series models.