Ok, Ive looked around a little and read the manuel and didnt find a solution. When I put a battery (bought from ProVape) in my mini the button flashes like the battery is dead. First time it happened of course I thought the battery was dead. So I pulled another off the charger and within a minute it was blinking. So I grabbed another and charged it. When I put that one in same result. My meter shows all three batteries between 4-4.2 Volts and they all work fine in my other devices. Any ideas out there as to what might be the issue. Is there a hard reset on these somehow?