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Polar M400 User Manual€¦ · 使用gps和心率传感器时电池工作时间至多为8个小时。仅在每日活动监测的时间模式中使用 时,工作时间大约为30天。工作时间取决于多种因素,例如使m400时的环境温度、使用的功能
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