| CPC G06Q 30/0645 (2013.01) | 7 Claims |

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1. A management system comprising a management server and an accommodation device configured to accommodate a plurality of batteries to be rented based on a usage contract,
wherein the management server is configured to perform information communication with the accommodation device,
wherein the accommodation device includes a computer configured to acquire rental information including a rental date and a time at which the battery was rented, and a return date and time at which the battery was returned to the accommodation device, during a usage contract period of an existing user who has made the usage contract for use of the battery,
wherein the accommodation device further includes a plurality of slots each configured to accommodate one of the plurality of batteries, each of the plurality of slots including a communication module that performs communication between the one of the plurality of batteries accommodated therein and the computer of the accommodation device so that the computer of the accommodation device acquires battery identification information of the one of the plurality of batteries accommodated therein,
wherein the management server is configured to:
perform the information communication with the accommodation device to acquire the rental information and the battery identification information from the accommodation device by receiving a signal indicating the rental information and the battery identification information from the accommodation device;
determine that a battery of the plurality of batteries is in an idle state in a first case or a second case based on the acquired rental information, the first case being that a predetermined time period has elapsed since the rental date and time without the battery being returned and the second case being that a predetermined time period has elapsed since the return date and time without the battery being rented;
determine whether or not a remaining period before end of the usage contract period is less than or equal to a threshold value, concerning the battery that is in the idle state; and
notify a terminal connected to the management server of idle-state existence information indicating existence of the battery that is in the idle state, in a case that the remaining period is equal to or less than the threshold value.
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