my mod makes a quiet high pitch wine when i plug in the micro usb to charge it. i am using the smok veneno lite edition, it will make the noise with and w/o the batteries in it. i’m using mxjo 18650’s
Did you notice it happening recently or when you first got it? It is recommended to use an external charger when charging your batteries. But in this case You can try to change the batteries and see if it’ll have the same problem, I recommend the LG HG2 batteries they are reliable and I’ve never have any issues with them. But if the problem reoccurs then it can possibly be a defect.