Also thank you for the videos and I always preach battery safety. I always make sure my builds are reasonable for the battery I'm using.
Although the videos give some good tips, his builds (0.06Ω & 0.09Ω) do not respect the CDR of a single 30A battery. 30A is the highest amp 18650 battery you will find. Any 18650 battery with a wrapper claiming 35A, 38A, 40A, etc is the "pulse discharge rating" not the "continuous discharge rating".
Check out this blog post by @Baditude (one of our resident battery/safety experts) regarding the "mislabeling" of batteries.
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.
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One other point to be considered when it comes to safety. Everyone is free to set their own parameters, and I can only say what mine are.
I try to never exceed 50% of the CDR (continuous discharge rating) of a fully charged battery (4.2v). So with a 30A battery, that would be 15A. This Ohm's Law Calculator tells me that a 0.28Ω 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, my 30A battery may only be a 15A battery.
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