OneV2 Minimum voltage needed to works

Hi guys
I need to power the V2 with classic batteries (on 3v3 pin after regulator) and I was wondering what is the minimum voltage I need to get things to works?
I just need Lora (of course) accell and GPS
Ublox V8 is M8M or M8Q? If it’s M8M I can’t go below 2.65V else 1.65v
Samd maybe 1.8v
Rn2483 2.1v
Lis3de 1.7v
So my guess is until 2.8v I’m good? And if I’m lucky with 8MQ ublox I can down to 2.1V?
What’s your thought guys?