I've a low power consumption regulator to get 3.3V from two 1.5V batteries. I'm going to use it for powering an arduino MKR (MKRFOX1200), so my question is where I should connect it, to the battery connector or directly to VCC.
Looking at schematics it's not clear to me which is the best option in terms of power saving, as VCC seems better but I don't know if it's ok to use that pin to give power