For the purposes of my project, I must use a 3.3v pro mini arduino to power it with a 3.7v Li-Ion battery. So I would like to know if using the Pro Mini at 3.3v has some disadvantages and what would they be?

3.3v or 5v Arduino Pro Mini?

Topic		Replies	Views
Battery Power for Arduino Pro Mini - 3v3 or 5v? Frequently-Asked Questions	4	14014	May 6, 2021
Arduino Pro Mini 3.3V or 5V General Guidance	5	1799	May 5, 2021
Arduino pro mini: 5v vs. 3.3v Frequently-Asked Questions	2	4578	May 6, 2021
Arduino Pro Mini Hardware	8	877	May 7, 2021
Any way to distinguish between the 3.3v and 5v Arduino Pro Mini? IDE 1.x	10	4839	May 5, 2021