NOVELTY - The method involves monitoring a charge drawn at an external power source to detect whether a recognized load pattern is present (230). A mobile electrical device is authenticated to receive power from the external power source (250). A signal is received from the mobile electrical device at the external power source indicating intent to draw a charge from the external power source. A message is sent to specify the load pattern of the charge to be drawn. An identification of the mobile electrical device is transmitted from the mobile electrical device to the external power source.    USE - Method for pairing a mobile electrical device i.e. plug-in electric vehicle such as plug-in electric car, with an external stand alone alternating current and direct current power source e.g. electric grid, electric generator, battery, fuel cell and photovoltaics, using a communication network e.g. wireless communication network and power line communication network (all claimed). Can also be used for laptop computers, notebook computers, personal digital assistants and cell phones.    ADVANTAGE - The method enables allowing a mobile electronic device to be authenticated to the electrical outlet, power connection and power source used for charging, so that billing account associated with the mobile device is billed for the cost of recharging of the mobile device.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for managing a charging session with a mobile device using an external power source connected to a communication network    (2) a method for pairing and authenticating an electrical device with an external power source among a set of power sources using a communication network    (3) an authenticator for managing a pairing of a mobile device and a power source    (4) a system for pairing a mobile device with a selected charging device using a wireless communication network.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a method for authentication of a mobile device.    Step for connecting mobile device to power source (210)    Step for initiating sequence of charge draws by mobile device (215)    Step for disconnecting mobile device (225, 245, 165)    Step for monitoring charge drawn at external power source to detect whether recognized load pattern is present (230)    Step for authenticating mobile electrical device to receive power from external power source (250)