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延长电池寿命自动睡眠模式，低电量显示。
Automatic sleep mode for long battery life, low battery indicator.
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如果一个低电量显示，打开系统关闭并取代。
If a low battery is indicated, turn system off and replace.
youdao
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如果一个低电量显示，打开系统关闭并取代。
If a low battery is indicated, turn system off and replace.
youdao