The HP BA06 Long Life Battery is a slice battery that slides onto the bottom of the HP EliteBook Folio 9470m Notebook PC to help you be productive longer than using the primary battery alone. - External battery for the 9470m. - Must be attached to notebook to be charged. - Stay connected and be productive wherever your work takes you. - No need to sacrifice performance, productivity or convenience. - Users who require an additional battery as a backup battery which can be charged separately.