This extended run 9-Cell Lithium-Ion Primary Battery replacement for Dell Inspiron 640m E1405 Laptops features Li-ion chemistry within its cells. Li-ion battery technology provides longer run times with less weight. This battery has 50% more power capacity than the original, providing you with longer run times. In addition, Li-ion batteries are not subject to 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. This is a 9 cell Li-Ion 11.1 Volt - 7200 mAh capacity battery. You can expect 3-4 hours of run time with this laptop battery.

Fits these Dell laptops: Inspiron 630m 640m and E1405 PP19L XPS M140 laptop models.

Compatible with Dell notebook battery part numbers: 312-0450, 310-0450, DH074, UG679, 312-0451, RC107, Y9943