I would like to create a retro game project and I have to be able to have a portable Pi without being plugged into a electric socket.
I have been looking into my phone battery and saw that it's 4.2v or the other 3.7 volt.
Would it be possible to connect the battery to the Pi Zero and run it like that? The official FAQ says the acceptable range is 4.8 volts.
To my understanding the Pi needs 400mA power to run, however the cap is 5.5 volts, so would it work with lower voltage but with enough power?
What about surge current protection and other electric risks? Does a phone battery have protection built in against that or does it need a custom circuit for it.
If not then please link me to a tutorial that teaches me how to make the Pi Zero run from batter, safely.