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UCTRONICS DC 6V 9V 12V 24V to DC 5V 5A Buck Converter Module, 9-36V Step Down to USB 5V Transformer Dual Output Voltage Regulator Board [2 Pack]
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Amazon.com: DC 12v Step up to 24v Boost Converter Regulator 10A 240W Power Supply Power Converter Waterproof Module Transformer Adapter for Motor Car Truck Vehicle Boat Solar System(12V-24V-10A) : Electronics
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DC 12v Step up to 24v Converter Regulator 5A 120W Power Supply Adapter for Motor Car Truck Vehicle Boat Solar System etc.(Accept DC9-20V Inputs)
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