Yup, mine does too, and that's exactly what it's supposed to do. As for weak vapor I suspect you have a Tootle Puffing tank, the airflow too restricted or the TC set too low. Tell me more about your setup and let's chat about that. Neither does my battery indicator appear to be out of line. When my VC4 charger says the batteries are full, and I pop them in the mod, the mod thinks so, too (as does my Fluke 87; I check them from time to time). When the mod shows them getting low and I swap them, the charger thinks so too.