i have gone thru 3 no 7 disposable e cig in the last 2 days,i am having an issue after smoking them for most of the day,they decide that they want to stop working,i notice the taste changes on the last puff,then the red led flashes 10 times and no longer produces any vapors and does not work,does anyone know why this happens,i read that sometimes it flashes as a fail safe due to puffing to much or a defective battery,but 3 in 2 days there supposed to be good for 500 puffs each,anyone know why they are malfunctioning,and if i can fix them? thanks