I was wrong!
The Samsung ICR18650-26F does NOT use the same volatile chemistry as LiPo batteries.
In a post in August I said it did. That is incorrect. As the MSDS document for the 26F shows, it uses the same “hybrid” NMC chemistry as that used in the 25R, VTC4/5, HE2/4, and other batteries we consider to be relatively safe to vape with.
NMC chemistry, nickel-manganese-cobalt, is one of multiple chemistries that use the “ICR” manufacturer’s model number prefix. Another one using that prefix is LCO, lithium-cobalt-oxide, which is used in LiPo batteries and is significantly more volatile than the other Li-Ion chemistries.
So while the 26F has a low 5.2A rating, low capacity for an under-10A battery, and I don’t recommend buying it, it is not any more dangerous to use than other batteries with the same chemistry like the 25R, VTC4/5, and HE2/4.
My apologies for any confusion this has caused. Bench test results for the 26F will be posted soon.
https://imgur.com/a/ayuEY