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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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Source 9v Battery Clip Charging Cable Micro Usb to battery power cord for effect pedal on m.alibaba.com
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Amazon.com: myVolts Ripcord USB to 9V DC Power Cable Compatible with The Boss ME-25 Multi-Effects : Electronics
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USB to 2.1mm DC Booster Cable - 9V : ID 2777 : $6.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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USB Boost Wire DC 5V to 9V 12V DC Jack 5.5x2.1mm 5.5*2.5 Mobile Phone Power Supply Step up Power Module Converter Cable Cord - AliExpress
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USB Type C 3.1 PD to 5.5mm Barrel Jack Cable - 9V 5A Output [1.2m long with E-Mark] : ID 5449 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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2.5 ft. DC 5-Volt USB to 9-Volt and 12-Volt Step-Up Converter 25-2 with Digital Display Extension Cord (4-Pack) 5T912 - The Home Depot
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Amazon.com: Ripcord USB to DC Power Cable, 9V, Center Positive, 2.1mm x 5.5mm tip, AA926MS : Electronics
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USB-C Wall Adapter - 6V-6.5V/3A, 6.5V-9V/2A, 9V-12V/1.5A (with Cable) - TOL-19466 - SparkFun Electronics
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Amazon.com: USB Port to DC 9V/12V Boost Cable 2.6ft Router Step Up Voltage Converter Cable with LED Display : Electronics
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2.5 ft. DC 5-Volt USB to 9-Volt and 12-Volt Step-Up Converter 25-2 with Digital Display Extension Cord (4-Pack) 5T912 - The Home Depot
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USB-9V - (USB to 9 volt step up power supply cable) (Works with Center negative polarity pedals) | Reverb
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