Our new A42-UL50 / A42-U53 8-cell battery is made with Samsung battery cells and rated at 4400mAh. The A42-UL50 is fully compatible is fully compatible with the following Asus notebook models:

Asus UL30 Series

Asus UL50 Series

Asus UL80 Series

Asus U53 Series

Asus U52 Series

Asus U45 Series

Asus U43 Series

Asus U35 Series

Asus U33 Series

Asus UL30 Series

UL30A-X5, UL30A-X4, UL30A-X3, UL30A-X2, UL30A-X1, UL30A-QX131X, UL30A-QX130X, UL30A-A3B, UL30A-A2, UL30A-A1, UL30A

Asus UL50 Series

UL50Vt-XX010x, UL50Vt-XX009X, UL50Vt-X1, UL50Vt-A1, UL50Vt, UL50VS-A1B, UL50Vg-A2, UL50Vg, UL50Ag-A3B, UL50AG-A2

Asus UL80 Series

UL80Vt-WX010X, UL80Vt-WX009X, UL80Vt-A1, UL80Vt, UL80Ag-A1

Asus U53 Series

U53JC-A1, U53JC, U53J, U53F

Asus U52 Series

U52F-BBL5, U52F, U52

Asus U45 Series

U45JT, U45JC-A1, U45JC, U45J

Asus U43 Series

U43JC-X1, U43JC-WX059V, U43JC-A1, U43JC, U43J, U43F-BBA5, U43F

Asus U35 Series

U35JC-A1, U35JC, U35J, U35F-X1, U35F

Asus U33 Series

U33JT, U33JC-A1, U33JC, U33J

and more.

The battery is the best replacement for the following Asus OEM battery part number:

Asus A42-UL50, A42-U53, A42-UL30, A42-UL80, A41-U53