OK! I just needed to know which one you were referring to. Kanger has a number of Mini tanks out as well as what is seen with Aspire. But the main issue is to expect that the limited displays on even eGo variable type batteries as well as the lower end regulated mods a company puts out can easily be a digit or two from the actual.
Here I have the Sense Herakles, FreeMax Starre, Starre Pro, and even Scylla tanks in lately the original Starre and Heracles being seen over a year ago and while those show upwards to 100-120w depending on coil guess where they vape the best with several flavors even some even custom blended together at times to experiment with adding one to a favorite to see what the result will be? 30-40w tops! You don't go by the max watts but by the vape itself! I was finding that out regardless of the resistance or watts thrown at something.
But as far as the resistance reading you see on a battery or mod once you get a good read from a regular ohm meter or a better mod that is a bit more accurate and usually seen at a much higher price any worry about the .1 or .2 variance will be eleviated for you.
This is something that catches everybody at first sight wondering why it shows "this" while the information shows "that: instead. I had someone fill me ip back when first getting an early Vamo model and then grabbing up some VV/VW gear between battery and the early box mods. These readings on most devices are more or less the approximated so you know when you have a 0.5ohm or 1ohm in a tank not 0.5, 0.6, 0.7, etc. as an exact science but a convenience mostly so you know when you have the right coil in. For RDAs and other rebuildables you then would be looking for a regular meter as a rule to know how your work comes out.