What i did is tear apart a power supply made from an old PC computer and contain everything inside the unit. It has 12 V , 5.2 V and 3.3 volt. I will use these externally so I can power and charge my gadgets, like my 2 CB Radios, my Police Scanners, my cell phones, tablets , cameras, etc.
I will add on USB Ports as well.
UPDATE: Added 12v Top Side Terminals