The HP OD06XL Long Life Battery is an additional or replacement battery for the HP EliteBook Revolve Tablet PC. - Carry as a spare backup for your primary battery to eliminate the hassle of frequently looking for a place to re-charge. - Be environmentally responsible and reduce overall battery waste by using fewer batteries over the life of the notebook. - Get the peace of mind of a three-year limited warranty. Additional support is available (North America only) seven days a week, 24 hours a day by phone as well as through online support forums.