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        <description>一、供电

DO2LA模块有一个供电口，接口形式为DC5.5*2.1mm,内正外负。

[内正外负]

输入电压范围为5V~12V，推荐使用5V2A,9V1A,12V1A的电源。

随设备赠送供电接头说明

[3.6~4.2V]

也可以使用手机充电器进行供电，需要用到USB转DC电源线，如下图。</description>
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