| 摘要 |
A portable web pad includes a battery for supplying power to the portable web pad, a memory unit for storing data of the portable web pad, a user interface for inputting a data keeping time which represents a period of time for keeping the data in the memory unit, and a control unit for controlling the battery according to the data keeping time. When the control unit the detects residual power of the battery to be less than power required for keeping the data in the memory unit during the data keeping time, the control unit controls the portable web pad to do a predetermined action.
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