Your HP DV9000 laptop may be a good system with adequate battery life, but if you want exceptional battery life, you should install a 12-cell lithium ion battery. USB Phone World has DV9000-compatible 12-cell batteries at amazing low prices. These replacement batteries weigh 1.49 pounds, have a capacity of 6600mAh and have voltages of 14.4V. All of our replacement batteries are new and are 100 percent OEM compatible. The batteries have a maximum run time of three hours 25 minutes with wireless off. Our 12-cell Compaq batteries at compatible with a large number of laptops in the DV9000 series family. Some of these systems include: HP Pavilion DV9201 series, HP Pavilion DV9339 and HP Pavilion DV9525. A complete list of compatible HP desktops is available at UPS Phone World. Just click on a link to one of our replacement batteries to access this list. HP DV9000 laptop computers had six-cell batteries installed when they were manufactured and although battery run times were good on the laptops, using 12-cell DV9000 battery packs results in great battery run times. All of our HP DV9000 replacement batteries are 100 percent OEM compatible and are guaranteed to meet or exceed OEM specifications. HP DV9000 laptops are considered multimedia computers and this environment results in the need for as much battery run times as possible. These computers had eight-cell batteries when they arrived on the market in 2007. Eight-cell batteries are okay, but if you want to maximize your system, 12-cell batteries are a great option. Our batteries come with a one year warranty, but our customers can purchase a three-year warranty at an additional low cost.