Each of my eGo-T’s are no longer working – flashing 3 times and 20 times

Each of my eGo-T’s are no longer working – flashing 3 times and 20 times I’ve two eGo-T’s that are defective. The problem occurs when I put a cartridge on the battery (which is fully charged) on my first eGo-T. Once I screw within the cartridge, really gradually and carefully, and hold the button down […]