I'm working on a project, here's the deal... I have 2 raspberry pis (3B, and a zero w) and 1 battery (3.7V LiIon 1200mAh). I bought a PowerBoost 1000 (A "DC/DC boost converter module can be powered by any 3.7V LiIon/LiPoly battery, and convert the battery output to 5.2V").
I'm planning on adding a 3.5 TFT screen to the pi zero, I would like to power both raspberry pis with the PowerBoost. Is this possible?
If not, is there a way to use the GPIO pins of the raspberry pi 3B to power the Pi zero?