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Plug DC power into charger, 4 indicators are light, LED is green(no battery)
没有电池情况下，接上电源，4个指示灯是亮的，LED为绿色。
youdao
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This software green, free, does not contain any plug-in unit!
本软件绿色、免费，不含任何插件！
youdao
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This software green, free, does not contain any plug-in unit!
本软件绿色、免费，不含任何插件！
youdao