I've read somewhere that the Voltage on the Cana is calculated and not measured... not sure if that's true... also not sure if I care.
But you'll notice that if your calculated voltage is below 4 volts when you fire, your resistance number will flash. this is because the Cana cannot fire as low of voltage as you have it set for, because the DNA 30 chip is not buck boost chip and cannot put out a lower voltage that what is coming from the battery, so it is defaulting to 4 volts. (or at least that is my understanding of it)
The new YiHi
SX350 chip IS a buck boost chip and CAN output a lower voltage that is input from the battery.... almost makes me wish I would have held out for the IPV 50w instead of the Cana. But then a little voice in my head says "why not both?" and then I feel all better.