There are NO 18650
batteries that are safe over 30 amps. Efest
batteries are rewraps of other
batteries and are rated way over their safe capacity.
@Mooch has done extensive testing of batteries for vaping and has test posted on this site.
@Baditude has some good info in his blogs as well. Look up their findings or pm them for help if you need to. If you are running lower power, you have several options, but if you want to crank it up, Sony VTC4's are you best bet. Don't fall for the Efest trap. Some are ok batteries, but you need to research which ones, and hope they don't change.