Best Buy offers computers as both a NEW computer and as an "open box" computer, which has a lower price. If the "open box" computer is missing any component, that is noted on a label on the box.
The new Lenovo Ideapad 100s includes the computer, its enclosed battery, the charger with attached charging cord, and a sheet of information on how to start up the computer. After you start up the computer, you find that a highly detailed owner's manual is included on the computer itself as a document you can open and read. There are also links to Lenovo websites with answers to standard questions and you have the ability to open a "chat" with a Lenovo technician if you have questions.