Replacement batteries for laptops such as the Gateway 3000 can be expensive when they are purchased directly from the manufacturer. A better alternative is to buy a new compatible Gateway battery from USB Phone World. Your Gateway laptop support documentation probably recommends using only original Gateway parts, but you can be assured that our replacement batteries will work beautifully when installed on your laptop. Our batteries are guaranteed to be compatible with your laptop and we have a 30-day money back guarantee in place if you are not satisfied with your purchase. In additional, all batteries are sold with a one-year warranty standard. Our 9-cell Gateway 3000 series battery will provide an immediate boost to your laptop after installation. You will be able to use your laptop for a longer period of time after replacing your original battery with this 9-cell battery. Selecting the best battery for your laptop is as easy as knowing your laptop model number. You can enter the model number into the search field at USB Phone World to be taken to pages with compatible batteries for your device. All of our battery product pages include a list of compatible laptop models and battery part numbers, so you can check those numbers on the list with your numbers to determine the best battery for your device.