I have ranted before on this, but IMPRES sucks a rock.
I have had more issues with partial battery data showing up (and thus the gauge won't display) that I have had ones that work right, even after properly conditioning the battery. I have some that are totally "stupid" (no data at all), and some that are partial (number of charges but nothing else), and that behavior changes from time to time at will, apparently. They SUCK. Did I mention that?
The MUC I have has the latest firmware but still has brain farts where it won't display the charge data, either. Half the time the stupid LED's don't even agree with the displays about the charge phase or status. I am THOROUGHLY UN-IMPRES'ed.