This brand new ASUS replacement laptop battery features lithium-ion cells. Li-ion battery technology provides longer run times with less weight. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This laptop battery replacement is 100% compatible with the original battery specifications and is individually tested and backed by a 2 Year warranty.

You can expect about 2 – 3 hours of run time with this Asus U57 battery when new, depending on your energy use.

This U57a battery replaces the A32-K55, A33-K55 and A41-K55 laptop batteries.