yeah, as i said int he earlier post about replacing the battery, i have 2 spinner 1300mah bats, after about 6 months of use, it doesnt matter if i use a protank, protank 2, vivi nova, no matter what i put on them, they fry the coils and juice turns black in about a day, i no longer use them, got a Innokin SVD, a Joyetech control head with a vapeonly body for 18350, and a UDT-S that i use now, and i have no issues with coils burning out. the analog variable voltage bats have reached the end of their usable life unfortionately. but no complaints here, love my new stuff. moral of the story, change the battery