This brand new Lenovo L12M4P21 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 L12M4P21 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 5 - 6 hours of run time with this Lenovo battery when new, depending on your energy use. This battery replaces the Lenovo Yoga 2 laptops and a host more which are listed at the extreme bottom of this web page.