i dunno anything about that brand of battery. they are likely re-wrapped name brand batteries, and they could be 'exaggerated' on the specs (there have been instances of companies re-wrapping 10a batteries with 30a labels
). its best to always use authentic/known batteries like sony/samsung/lg. have a look at
mooches battery charts and videos to learn a bit more if you want.
to figure out the answer to your question, you can use an ohms law calculator to find out exactly how many amps you are drawing form your cells.
have a look at this post. the hex is a variable voltage/regulated series mod, so you will always only have the amps of a single cell, but the voltage is doubled, and can be adjusted. depending on the voltage setting and the resistance of your build, your amp draw will change, which makes it possible to have a build thats 'safe' at a lower power and 'pushing your amp limit' as you turn it up. you can use the calculator to know whats going on and make your own choices