Go to Amazon Sites : br br Toshiba Primary Li ION Battery Pack for Toshiba Series Portable Computer (PA3818U-1BRS) br br Snaps in and out of the battery slot in seconds br Genuine Toshiba quality and reliability br Extend the life of your Toshiba notebook while on the road br Take your office on the road without sacrificing performance productivity or convenience br An additional battery pack provides extended power to work and play without worries br Get a spare to extend the battery life on the go for lengthy meetings on campus and flights