A management device is a management device that manages replacement of batteries. The management device includes an obtaining portion that obtains, from a first battery, specific information that specifies identification information of a vehicle to which the first battery has been attached, and identification information of the first battery. The management device includes an authenticating portion that authenticates a user of the vehicle by using the specific information and the identification information of the first battery that have been obtained by the obtaining portion. The management device includes a replacement receiving portion that receives replacement of the first battery if the authenticating portion authenticates the user.