This brand new MSI A4000 MS-1451 Laptop Battery replacement. This 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 hours to 3-1/2 hours of run time with this MSI A4000 battery when new, depending on your energy use.