i have sometimes problems with my concept of powering the Arduino Nano with two cr2032 coin cells. I soldered two coin-cell battery holders on a board and connected the arduino nano Vin and GND terminals to it. Unfortunately the batteries can loose contact for fractions of a second due to rotation/bumping in the holders. Should i get better holders or can i buffer such short bumps with i.e adding a capacitor?
Find attached the picture of my circuit.