Always on the go? No more worries for running out of battery power! You can back yourself up with this 12-Cell Lithium-Ion Extra Battery for your notebook. Lithium-Ion batteries are longer lived than conventional batteries and do not require replacement as often. There is no battery memory effect with this Lithium-Ion battery — you can charge the battery whenever you like without fear of reducing its charge capacity. Moreover, you do not need to drain the battery completely before recharging it.