This brand new Samsung M40 X15 X20 X25 X30 X50 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 1 year warranty.

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

This battery replaces the Samsung M40 X15 X20 X25 X30 X50 series laptop batteries and a host more which are listed at the extreme bottom of this web page.