CABLE USB DC 5V A 9V-12V – CoolTech
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Descripción
Con este cable, puede conectar su banco de energía al enrutador. Por lo tanto, cuando corte la energía, puede usar su banco de energía USB qc3.0 para suministrar su router.
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Plug & Play, it is really handy when travelling or outdoors, just power it with a 5V 2A-4A power bank and you can start running your 9V Guitar Effects
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This DC-to-DC adaptor is widely used. The suitable power is about 10 W. It is USB step-up boost converter cable with digital display.
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power supply - How does such an USB step-up 5V-12V work? - Electrical Engineering Stack Exchange
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