Abstract: A server includes: a communication unit that communicates with a mobile terminal (terminal) of a user; and a processor (control unit) that controls the communication unit. When the communication unit has not received deterioration information (battery information) on a battery from the mobile terminal for greater than or equal to a cycle (predetermined period), the processor performs control for obtaining the deterioration information through the mobile terminal.

Abstract: A leasing method includes obtaining first data representing a history of a current that flows in a power storage mounted on a vehicle, obtaining second data representing a history of an amount of accelerator operation in the vehicle, obtaining third data representing a travel distance or a time period of travel of the vehicle, obtaining an accident risk of the vehicle based on the first data, the second data, and the third data, and obtaining a degree of exhaustion of a consumable including the power storage based on the first data, the second data, and the third data, the consumable being provided to the vehicle by lease.

Abstract: A server includes: a communication unit (acquisition unit) that acquires information about a degree of degradation of a battery (secondary battery); and a processor (control unit) that calculates a lease fee of the battery using the information about the degree of degradation of the battery. The processor performs suppression processing for suppressing an increase of the lease fee, the increase of the lease fee being based on deterioration of a degree of discharging-caused degradation caused by discharging in response to a request for adjusting a power demand/supply state in a power system (PG).

Abstract: A server includes: a communication unit (acquisition unit) that acquires information of a capacity retention (degree of degradation) of a battery (secondary battery); and a processor (control unit) that calculates a lease fee of the battery using the information of the capacity retention. The processor performs suppression processing for suppressing an increase of the lease fee, the increase of the lease fee being based on deterioration (decrease) of the capacity retention due to an environment in which the electrically powered vehicle is used.

Abstract: A management method for a power storage device includes: when energy management by charging or discharging of a power storage device is requested from an aggregator, determining whether or not requested power for charging or discharging exceeds a predetermined value; when the requested power exceeds the predetermined value, if the aggregator having requested is a registered aggregator, performing charging or discharging of the power storage device in accordance with the request; and when the requested power exceeds the predetermined value, if the aggregator having requested is not the registered aggregator, not performing charging or discharging of the power storage device in accordance with the request.

Abstract: A management method for managing a power storage device includes: when information indicating that an accident has occurred with regard to a target vehicle including a power storage device, obtaining first owner information indicating an owner of the power storage device from a data management device that manages information about a plurality of vehicles including the target vehicle; specifying the owner of the power storage device using the obtained first owner information; and providing, to a terminal of the specified owner of the power storage device, a notification that informs the occurrence of the accident of the target vehicle.

Abstract: Problem is to provide a bone conduction speaker unit which is compact as a whole, and can be used, being simply and neatly mounted to a great variety of pieces of existing communication equipment, such as mobile phones. A unit case 1 is provided which incorporates a bone conduction speaker 2 such that a diaphragm 3 is exposed, with an earphone-jack mating plug 4, which is connected to the bone conduction speaker 2, being disposed on the unit case 1, and by connecting the plug 4 to an earphone jack 22 on a cabinet 21 of a piece of communication equipment, such as a mobile phone, the piece of communication equipment is allowed to be used as a speaker.

Abstract: Problem is to provide a bone conduction speaker unit which is compact as a whole, and can be used, being simply and neatly mounted to a great variety of pieces of existing communication equipment, such as mobile phones. A unit case 1 is provided which incorporates a bone conduction speaker 2 such that a diaphragm 3 is exposed, with an earphone-jack mating plug 4, which is connected to the bone conduction speaker 2, being disposed on the unit case 1, and by connecting the plug 4 to an earphone jack 22 on a cabinet 21 of a piece of communication equipment, such as a mobile phone, the piece of communication equipment is allowed to be used as a speaker.