| 摘要 |
A battery monitoring and control unit 52 monitors a battery 51 mounted in each of a plurality of terminals installed in a retail store. Total operating time during which the terminal has been operated by the battery, number of recharges that have been performed on the battery, or actual operating time during which the terminal has been operated on a single charge of the battery after completion of charging, is monitored. End-of-life time is predicted according to the state of consumption of the battery. Battery state information including the end-of-life time is transmitted at periodic intervals to a server 4 and transferred to a host 11. Based on the received end-of-life time, the host indicates on a store-by-store basis any terminal that is to be subjected to battery maintenance scheduled next time.
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