self-contained battery 中文意思是什麼
self-contained battery
解釋
固定電池-
First - time use - before you can use your headset, charge its self - contained battery for two hours
重復充電當從聽筒聽到5聲快速警告音並每間隔20秒重復一次時,表明您的耳機需要再次充電。
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