Patent ID: 8280759

Claim:
An information system including a receiving device driven by a secondary battery and a server connected via a network to the receiving device and providing a service to the receiving device, the receiving device comprising: a memory of the receiving device; and a processor of the receiving device connected to the memory of the receiving device, wherein the processor of the receiving device is configured to operate in accordance with executable instructions that, when executed, cause the processor of the receiving device to perform: notifying the server of a charging state of the secondary battery; receiving information provided continuously for a predetermined period of time from the server; and outputting the information to an output device, the server comprising: a memory of the server; and a processor of the server connected to the memory of the server, wherein the processor of the server is configured to operate in accordance with executable instructions that, when executed, cause the processor of the server to perform: receiving the charging state of the secondary battery from the receiving device; providing the information continuously for the predetermined period of time to the receiving device; accumulating fee-charging information for providing the information together with information for identifying the receiving device; estimating, based on the charging state of the secondary battery, a period of operating time for which the receiving device can operate continuously from a start of receiving the information; and recording information representing that the receiving device can continue the reception for the predetermined period of time, the accumulating includes excluding, from fee-charging target information, information that is provided for a period of non-operating time for which the receiving device is presumed, from at least the charging state, to be disabled from continuing the reception when all of the following conditions are met: the fee-charging target information was provided to the receiving device in the past; a piece of information that the receiving device can continue to receive the information for the predetermined period of time is not recorded; and a piece of information that the charging state of the secondary battery is not sufficient for continuing the reception is recorded.