The DIY benchtop power supply is equipped with a XH-M401 module and a XL4016E1 DC-DC buck converter handles the voltage regulation providing electronic engineers, hobbyists and developers with a ...

Another answer is to find a higher voltage supply and mate it with a cheap power supply module. We’ve also seen non-PC power supplies put in a PC case.

TK discusses a portable power supply module known as a Battery Shield for Raspberry Pi and Arduino.