| 摘要 |
PURPOSE: A method for using a residual power of a smart phone battery is provided to use an electronic note function when the battery is mostly consumed. CONSTITUTION: If a smart phone performs an important routine(ST1) and judges that a residual power of a battery is less than a certain quantity(ST2), the smart phone rings a warning sound per a certain time(ST5). The smart phone successively judges whether an electronic note function is requested and the battery is perfectly consumed(ST6,ST8). If the electronic note function is requested from a user, the smart phone performs the electronic note function(ST7). If the battery is perfectly consumed, the smart phone stops operations(ST9).
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