As part of equipping my home laboratory, I bought myself such a miniature power source from Aliexpress. 5V x 30 A are squeezed into dimensions of 185x100x78 mm and weight less than 700 grams! The control potentiometers also have a push action, so that each digit of current and voltage can be adjusted separately. There is nothing superfluous in the kit - a power cord and two banana-crocodile cables are what you need, I love minimalism. Such an animal costs less than 30$.

I received it today, tested (nothing heats up even at maximum power, limitations work, accuracy is normal) and decided to order a couple more.