| 摘要 |
When a low charge state where the charge remaining amount of a battery that supplies power to onboard equipment is at or below a predetermined amount or an abnormal state of the battery is detected, the detection is notified to a server through a communication section. The state notified to the server is recorded in a storage section. When a portable terminal inquires of the server, the state of the battery recorded in the storage section is transmitted to the portable terminal. The portable terminal displays information as to the state of the battery received from the server.
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