5V-32V In to 1.5V-35V Out XL6009 Boost Buck DC-DC Converter – Envistia Mall
Dc Dc 9a 300w 150w Boost Converter Step Down Buck Converter 5-40v To 1.2-35v Power Module Xl4016 For Arduino - Integrated Circuits - AliExpress
OSKJ DC/DC
DOACT Step Down Voltage Module, 8A DC-DC Converter Module, Mos Tube 12V 24V Charging Usb Powered Equipment For Mobile Phones Navigation Digital Camera - Walmart.com
Boost Converter Charger for Mobile Phones Jameco Valuepro
I reversed engineered a buck-boost converter module because i was unable to find the schematic of it. more in comments : r/AskElectronics
3pcs DC-DC 10-32V to 12-35V 150W 6A Car Notebook Mobile Power Supply Adjustable Boost Module
Amazon.com: 5V-32V Input to 6V-48V Output Adjustable Boost Step Up XL6009 DC -DC Converter : Electronics
90W Power Supply Module DC 4.5~60V to 1.25~30V 3A Buck Converter/Adjustable
5PCS DC to DC 3A Step Down Module (13276) from ICStation on Tindie