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Amazon.com: USB DC 5V to 9V Step Up Power Cable(3ft), Farsense USB to DC 9V Adapter with DC Jack 5.5 x 2.5mm(3.5 x 1.35mm), USB Boost Converter Supports LED Indicator : Electronics
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Amazon.com: iGreely DC 5V to DC 9V USB Voltage Step Up Converter Cable 3.3ft/1m Power Supply Adapter Cable with DC Jack 5.5 x 2.5mm or 5.5 x 2.1mm, for Fan, Led Light,
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Amazon.com: 2 Pieces DC 5V to DC 9V 12V USB Voltage Step Up Converter Cable with 1A Step-up Volt Transformer Power Regulator Line with LED Display for Fan, LED Light, Wireless Router,
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