I don't know what I am doing wrong but I have a kanger protank 2 and an ego twist 1300mah variable voltage battery. I set the voltage on 3.6 or 3.8, but the coils burn out after 1 day of usage. I look at them and the wicks are black and burn my juice if I use them so I have to change the coils everyday. That doesn't seem right, my mom has the same setup but uses a vision spinner variable voltage 900mah battery, turns it to 3.8v and her coils last a week, sometimes longer. Can anyone tell me what I am doing wrong? I would really appreciate the help as I can't keep changing coils everyday, it's ridiculous. Thank you in advance for any help or suggestions you have. Also I use 2.5 ohm coils in the Kanger Protank 2.