He's using the phantom mod by wotofo and the mutation x v4 RDA.
Here's some information for your brother. For safety reasons he should NOT be building that low on a mechanical mod.
When considering how low you can build you need to give yourself some headroom. I try to never exceed 50% of the CDR (continuous discharge rating) of a fully charged battery (4.2v). So with a 20A battery (
like the Sony VTC5), that would be 10A. This
Ohm's Law Calculator tells me that a 0.4Ω build is as low as I would want to use.
The reason that I place a 50% limit is because as a battery ages the mAh of the battery degrades, as the mAh degrades so does the batteries c rating (amp limit). So down the road, a 20A battery may only be a 10A battery."
With a 30A battery (
like the LG HB6), 0.28Ω is the lowest I would build.
_____
I highly recommend he spend some time with
@Baditude &
@Mooch (two of our resident battery/safety experts) and visit their blogs.
Here are links to some of Mooch's blogs:
Hand several links to
Baditude's Blog - Table of Contents: The blogs that address battery safety, Ohm's Law, CDR (continuous discharge rating/Amps) and how they all work together are detailed below:
BATTERIES
Battery Basics for Mods - The Ultimate Battery Guide
* Another essential read to understand which batteries are safe to use in mechanical and regulated mods. Includes a frequently updated list of recommended safe-chemistry, high-drain batteries with their specifications.
Purple Efest Batteries not as Advertised
* A cautionary blog that reveals that the purple Efest batteries may not have the specifications advertised. Also includes a commentary on "continuous discharge ratings" vs "pulse discharge ratings" of battery specs.
OHM'S LAW
Ohm's Law Explained for Vapers
* My attempt at explaining Ohm's Law in layman terms and how it relates to
vaping.
Explain it to the Dumb Noob: Ohm's Law Calculations
* As simple as it is to use, some people have a tough time grasping the concept. Warning: Includes graphic photos of mod explosions.
