Ok, I have a bizarre question.
I have a device that will work at either 4.2v-3.5v or 8.4v-7.0v and it does different things in either configuration.
It draws a fair amount of current in either config.
It was designed to run on 18650 batteries using 2 either in parallel or in series.
Is there a way to make it so that the battery sled will automatically detect and switch between the two modes?
I am thinking 2 or 3 mosfets should be able to do this I just can't figure out how to do it.
Anyone out there have any ideas?
I'd like it to be able to simply supply the correct way depending how the batteries are installed.
I guess I should mention that I am trying to keep this small.
