All of our laptops have been tested and refurbished to be ready to go when they arrive at your home or business. A power adapter is included with every machine. At this time, we do not warranty the life or functionality of the laptop battery but all batteries have been tested to have at least 80% of their original capacity. All computers with Windows installed have a recovery partition so you can restore the operating system yourself at any time. We are a Microsoft registered refurbisher and all of our machines meet their refurbishment standards. If you're interested in having the memory or hard drive customized, please don't hesistate to contact us for recommendations or pricing.