danlisi:
What's the best resistance atty off a 5volt box mod ?
DSE 901 or a 510 cartomizer from Nhaler.
5v/3.4ohm *5v = 7.35W
Can I use a standard 510 Atty without burning it out?
You can, but it runs hot. You could try short draws keeping the atty soaked. Too long a draw can burn it out, so you have to pay more attention on higher voltages than the lower ones.
5v/2.1ohms *5v = 11.9W
Sweetspot = 6-8W for safe
vaping with flavor