Before you start doing your own builds, I highly recommend you spend some time with
@Baditude &
@Mooch (two of our resident battery/safety experts) and visit their blogs. Make sure you purchase an ohm reader and a voltmeter or DMM so you can measure your builds, check for shorts and measure the remaining charge on your batteries.
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 Samsung 25r), 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.
Here are some of Mooch's blog links I often post for others:
And below are several links to Baditudes blogs. The blogs that address battery safety, Ohm's Law, CDR (continuous discharge rating/Amps) and how they all work together are detailed below:
BATTERIES
#9.
Battery Basics for Mods: The Definative Battery Guide for Vaping
- A popular and 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.
#17.
Purple Efest Batteries Not As Advertised
- A cautionary blog that reveals that the purple Efest batteries may not have the specifications advertised. Also includes an important commentary on "continuous discharge ratings" vs "pulse discharge ratings" of battery specs.
OHM'S LAW
#14.
Ohm's Law Explained for Vapers
- My attempt at explaining Ohm's Law in simple layman terms and how it relates to vaping.
#16.
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.
BATTERIES - WHERE TO BUY
Only buy batteries from a reputable supplier (not ebay or Amazon) as there are many counterfeit batteries being sold. Here are several reputable battery suppliers in the US.