depends on the amps you are demanding, and which AW 18650 you are using. If it's the 1600 mah aw, then you're good to 24 amps, or so, but if it's the 2000 mah, frak that one is worthless, only 10 amp continuous, and even if you aren't pushing 10 amps. Fraking thing peters out at 3.9 volts when trying to push more than 20 watts. pos, imhfo.
Buttons tops are safe, as long as one isn't pushing their continuous amp limit. Any batt once stressed beyond it's capabilities is not "safe", or something like that. Most button tops don't have the high amp continuous as many flat tops. And just thinking out loud, feel button tops were designed for low iq entities that could not figure out + form - just thinking
vape long and prosper.