Well I Have had my lavatube for about a month now I started off with 2.5ohm dual coil carts in my tank. I just bought some 3.0 Single coil cart for my tank and things are starting to act weird when I put my voltage higher than around 4.1 volts when vaping the screen dims and blinks at higher voltages. I know the batteries are charged when reading the voltage out of the lava tube it reads 4.1 and I have been taking them on and off the charger. I'm not sure whats up if its the cartomizers or my batteries but It shouldn't be the batteries they are maybe a month old any suggestions? I really dig this Mod Maybe a new tank idk