Power up your system for business trips and vacations with this 6-Cell Lithium-Ion Spare Battery from Dell™. It has a 53 WHr capacity and comes with features like charge indicator and health gage to help you monitor the available power. Lithium-Ion batteries are longer lived than conventional batteries and do not require replacement as often. There is no battery memory effect with a lithium-ion battery — you can charge the battery whenever you like without fear of reducing its charge capacity. M