BAK is a high quality Chinese cell brand, similar to Lishen
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Hmm yeahh I think Iāll go with the Canadian molie brand.
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Definitely not a bad choice, mostly because youāre in such a low P configuration.
If only I could get some 30Tās then I can go with a 1p pack.
BAK is a huge, established cell manufacturer, larger than Molicel, and they make some pretty good cells. You mentioned low cost and BAKās cost less than Molicels. You never mentioned not wanting China-manufactured cells, which are almost always available at a lower cost than cells from the big manufacturers and often have equal performance.
Iām confused why you felt I would recommend crappy cells.
Just a side noteā¦all li-ion round cells can corrode, theyāre nickel-plated steel. 
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Oh its not the cells that are the problem the open air corrosion was something that happened to me before so I was trying to avoid it this time. Iām not sure if anyone tests this to be honest.
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Absolutely not, the voltage sag would be huge and your range would be terrible. And the Molicel P42A runs for longer than the Samsung 30T at 30A.
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All of the round cells are susceptible to that though.
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Yeah but Iām sure the thickness of the nickle plating is different.
Your battery has its cells out in the open?
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Well I live by the coast so the air is salty and getās in somehow.
Probably, but the edges are exposed at the top for all cells, where the top is crimped over.
Thereās probably some company, lab, or govāt agency who tested for this somewhere. Might be worth a search?
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I looked it up and sony murratta vtc4 18650ās pop up but this looks old 2018. Is there a new version of this cell?
Well its not sealed to air Iām not even sure if thatās possible.
Since 2017 the VTC round cells have been made by Murata and we havenāt, to my knowledge, seen any external changes in the cells since then. But there certainly could have been adjustments in the base alloy, plating thickness, etc.
You might consider conformally coating your entire pack once all wired up, to seal everything, if corrosion is big concern for you. Since spot-welding blasts through the plating on the cells you canāt depend on one cell or another having better protection.
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Iāll test the cells individually by dipping them in the sea and leaving out in the sun for a week. What were those BAK 5000mah cells called again? Iāll do the 2100 VTC murrataās and molie 42a cells too.
Iād recommend using something like these: https://www.amazon.com/Zerust-Rust-Prevention-Plastabs-Pack/dp/B00ULSW6FS
Theyāre plastic infused with volatile corrosion-inhibitor compounds that slowly diffuse out and protect anything stored nearby. A fairly well-sealed enclosure with one of these in it should keep your pack nice and happy for several years even in salty air.
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Watching your videos very informative.
Oh dang those are brilliant! I never knew such a product existed.
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Cāmonā¦just scroll up and check. 
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