There is a thread on ecf about changing batteries, changing ohms and the Vamo. The conclusion was to check ohms on carto before firing so just in case , the Vamo can adjust to it due to less than a second delay in adjustment that might blow the carto a/atty depending on change.
That was some-one changing batteries with two 18350s stacked, and using low resistance atomizers. Changing a single 18350 or 18650 won't cause that problem. Using two 18350 with standard resistance won't cause that problem either.
If you stack 18350s and use low resistance then just click the ohms check button after changing the batteries.
So, when changing two 18350s - after you've put the two new batteries in, click the right button to check your ohms on your atty/carto/tank - and your fine.
Just changing one battery isn't going to blow anything.
Using
low resistance and
changing two 18350s for two more is where you need to make sure you click the ohms check first.