Firstly, I want to say thank you for looking at my question. I am trying to make something for my nephew, but I really don't have much experience in electronics, even though I have been researching it heavily.
Basically, I want to make a device in which a slim rechargeable battery (think a phone battery pack) powers all the following:
1) 2 5 Volt Peltiers, (Max 5A, 6.2V @ 19.4 Watts) --> http://amzn.to/2tqHYKM
2) 2 12 Volt Fans with 2 PINS (http://ebay.to/2vwNAo6) OR 2 4 Pin, 5 Volt Fans
3) An off/off switch would be nice, but a power/speed adjuster is not necessary as I want all devices to run on full speed all the time (19.4 Watts); however,an option to shut the device automatically after a certain temperature is reached is necessary.
What I know
I don't want you guys to think I don't know anything, so I know that I need some sort of circuit board that allows me to output and take in either 12V and 5V, or just 5V, and then I need the same circuit board to be able to take a 2, 2 Pin fans (or 2 4 pin fans) and 2 Peltier devices; although I might only need one.
I have been researching and have come across items such as "PWC controller" for a 4 pin fan, yet they have all only been able to take in 12 Volts. I know that circuits exist in which both 12v and 5v power outputs from a 12V power supply .
Furthermore, I know that the board for for power input and output is called a "charging board", but connecting the puzzle pieces in which a rechargeable battery powers what I want is so beyond me.