I just want to say that I am relatively new to mods. I have used the eVic supreme for a month or so but wanted to get the sigelei 30w due to the fact that I could adjust the center and many of the positive reviews. I got mine in yesterday and fully charged new Efest batteries and all I get is short or low res error. I tried 3 different batteries in total 2 brand new Efest 35a and one sony. All coils read at 2.5 and read fine on my eVic and itaste. Also the one Efest battery started smoking in the chamber. Has anyone had any similar issues or ways to fix my issue? I am contacting the vendor I purchased the device to try and see if I just got a bad unit. Thanks!