Whitenergy laptop batteries use advanced Li-Ion cells with no memory effect. This means they work efficiently for a long time without significant loss of capacity. To make sure that you have selected the correct battery model for your laptop use the Whitenergy Product Finder, available at http://www.whitenergy.com. CAUTION ! Check if the voltage of the battery selected agrees with your notebook specification, the difference should not be greater than 0,5V.