Hi chuckybutt,i'm newbie have same issue with my vt75nano,it hot quickly after 5-8 puff,i use khantal A1 24 ga,6 wraps dual coils on tsunami rda,running in 55 watt,.40ohm,i use awt 3000mah 40A,and mxjo 3000mah 35A batteries,and it same very hot.so should i buy a new battery?