Thanks! So then is Ohm's law not really taken into account for regulated mods? Just trying to be sure.
With a modern-advanced regulated mod such as the Geekvape Aegis X, the impact of the ohms on the efficiency of the mod is minimal. An quick-'n-easy rule of thumb for battery safety on a regulated mod is to just take the true CDR (Continuous Discharge Rating) of the battery as listed by Mooch in his battery test results, battery ratings and performance charts, or recommended list of batteries... then multiply that number by three. This will give you the maximum wattage number that is considered to be relatively safe to vape on a regulated mod
per battery. So, because the Aegis X is a dual battery mod, you can double this number. (Whether the multi-battery regulated mod in question hooks up the batteries in a series configuration or in parallel, doesn't make a difference in any way at all.)
That said, the HohmTech Hohm Life 4 has not AFAIK been tested by Mooch, but I am fairly certain that it is a 20 amp battery, as that's what's stated in the datasheet available for download on imrbatteries.com, here:
https://www.imrbatteries.com/content/hohmtech_life.pdf
imrbatteries.com is on Mooch's list of trusted battery vendors, and, on YouTube, Mooch calls himself Battery Mooch. So, be sure to check out his videos on there, and read the description underneath each video to find ones that you might like to watch.
So up to 120 watts is called reasonably safe for what you have asked. Reasonably safe, not 100% safe. The lithium-ion rechargeable typical round cells we use for vaping were never intended to be used outside a fully protected battery pack with a protection circuit. A damaged battery wrap or top insulator ring can short circuit the battery, which is much more of a safety concern than is exceeding the maximum recommended power level for the battery you choose. A regulated mod's built-in safety protection features does not protect the user from choosing the wrong batteries nor from the user abusing/mishandling the batteries. In addition, the built-in safety protection features can still fail.
As for the efficiency of a regulated mod,
@~Don~ has it right. But most newcomers think it's rather complicated, and, more often than not, there's no easy way to determine the efficiency, anyway in the first place so... that's why there is a simplified version of how you can calculate for regulated mods.
I hope this helped.
EDIT: So apparently Mooch did test the Hohm Life 4 after all. As you can see for yourself, it doesn't perform better than the Samsung 30Q or the Sony/Murata VTC6. If you plan to vape at about 80 watts or higher on the Aegis X, I suggest that you go for a pair of Molicel P26A batteries instead, and get them from a place that's on Mooch's list of trusted battery vendors. (This list can easily be found at the bottom of the descriptions underneath each one of his videos on YouTube.)