I bought a Raspberry Pi project kit call "Freenove RFID Starter Kit for Raspberry Pi 4 B 3 B+, 423 Pages Detailed Tutorials, Python C Java, 204 Items, 53 Projects, Learn Electronics and Programming, Solderless Breadboard" from amazon. In the Kit there is a power board.
I was curious if you can attach BOTH the Power board module (which is powered by a 9 volt battery) or cord and the GPIO Extension Board attached to the Raspberry Pi 4B GPIO pins at the same time?
Ken