Keep your laptop powered up for all the work or play you need to do with this Gateway 8-Cell Lithium-Ion Battery. Keep this extra battery on-hand in your computer bag, backpack or carry-on, and you\'\'ll always have reserve power for your laptop whether you are on the job, in class or en route to your next destination. Easily charges through your computer\'\'s AC adapter for up to 4-1/2 hours of continuous use -- whether you are drafting plans for the newest skyscraper in the skyline, writing the next great American novel or blasting a path to freedom through an army of evil, mutant invaders from the planet Xenox.