5V To 9/12V Step-Up USB Adapters - Do They Work? - YouTube
Amazon.co.jp: SODIAL USB DC 5V DC 12V 2.1mm X 5.5mm Module Converter DC Barrel Male Connector Jack Power Cable Plug, USB-DC Cable-1M (5V?DC 12V) : Computers
Amazon.co.jp: USB 5V-12V DC Power Supply Cable, USB to DC (Outer Diameter 0.2 inches (5.5 mm) Inner Diameter 0.08 inches (2.1 mm) Converter, Adapter 8 in 1 TP-Link/12V Fan/Dash Cam/Radiator/5V Mini Speakers,
USB Type C 3.1 PD to 5.5mm Barrel Jack Cable - 12V 5A Output [1.2m long with E-Mark] : ID 5450 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Universal USB 12V Step-Up Power Cable | Jaycar Electronics
USB 5V to DC 12V 2A Step Up Automatic identification Emulator Trigger Cable with DC 5.5 x 2.1mm Connector - Soshine