This Lenovo L11M3P02 battery works with the IdeaPad U510 and U31 laptops.

Li-ion batteries are not subject to the memory effect common with older battery technology. This L11M3P02 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 3 hours to 5 hours of run time with this Lenovo L11M3P02 battery when new, depending on your energy use.