To start, I am a software guy, and I really want to ensure I not going to destroy any components. I previously looked at power through a USB power bank, but the issue with these is that they turn themselves off with low current pull.
My question is: I have a number of Arduino shields and would like to power them with 4 rechargeable AA batteries, and therefore would like some advice on what to use without frying any electronics.
The rechargeable batteries I have are these 1.2V AA (NiMH). Going on their rated value they should supply 4.8V. Testing the 4 batteries in serial gives me 5.3V overall, or around 1.325V per battery at full charge.
So if the batteries provide more than 5V, I cannot safely plug them into the 5V pin on the Arduino. But if the batteries could potentially provide around 4.8V to 5.5V plugging them into VIN means that the voltage regulator will take too much power, reducing the overall voltage to be too low for all of the shields (Which require 5V). What should I do in this situation?
This is a list of the current equipment that will require power:
The shields will be stacked on top of each other.