I scavenged a li-ion battery from a broken laptop. It is made of 6 Samsung ICR18650 cells (3.75V 2800mAh), parallels two by two so that the total pack is in fact the sum of 3 cells at 3.75V, so 11.25V (it's written 11.1V on the pack).
I have a raspberry pi which can run out of only one power boosted cell to 5V.
But I also have a TFT screen which runs on 7-12V (consumes less battery near 12V than near 7V).
I would like to know if I can actually plug the screen to the full battery, and the raspi to only one third of it.
I know cells have some kind of "balance" so I am wondering if that could make the battery unstable as one part of it would discharge at a faster rate.
As another solution to my problem, would it be possible to powerboost 5V to 7V or 12V so that everything runs from the same number of cells ?