I usually drop my batts down to 3.5v area then charge them. thats just what i do and its convenient for me and my vape style.
Ok... I have been vaping on my Ego Twist batteries until the button flashes. I then put that one on the charger and pick up a charged one. I guess I thought the blinking light was the indicator that its time to charge. Plus it shuts off .... ;-) Am I letting the batteries get to low before charging?