HP is dedicated to providing you with innovative power solutions to increase your notebook"s entertainment and productivity value while reducing your total cost of ownership. The HP Long Life Battery has up to a three year life span backed by the industry"s first three-year limited warranty. HP is committed to the environment and reducing battery waste. Fewer batteries are used over the life of the notebook with HP Long Life Batteries making this a smart choice for you and the environment.HP MU06 Long Life Battery . 6 cell lithium ion battery. Compatibility Statement: HP Pavilion: dm4, dv7, dv6, dv5, dv3 HP: G42, G62, G72, ENVY 17 Compaq Presario: CQ32, CQ42, CQ62, CQ72