Must have a slight quirk with mine.
Even if the battery's charge is 3.5v I can't fire it below 4v without the ohms flashing (unregulated). Is this right? I tried it with the battery at 3.5v and it wouldn't fire regulated on an 0.8 ohm coil at 19 watts (3.9v).
Though the CANA reads atties 0.1 ohm lower and using an inline meter it always short on output by 1 to 2.5 watts. It the revised Cana with smaller 510. Everything else spot on, wakes and fire out of sleep with first click etc. No biggie just up the watts a bit