I’m wondering what kind of chemistry is in the Wurkkos 21700 batteries.
ICR, IMR, or INR?
I brought two of them. I wonder if I should’ve opted for other batteries. I don’t have very high drain devices, more interested in capacity than high drain turbo usage.
https://www.wurkkos.com/products/21700-rechargeable-battery-5000mah-3c-15a-2pcs-box
Most probably it’s either from Lishen or BAK. Both manufacturers don’t provide any information about the chemistry.
my guess is INR, based on this post:
That are very old batteries, though. Not sure if they use DLG currently, in the last years they used Lishen and BAK.
Im not set up to rewrap… or I would remove the wrapper on one of the new batteries, to confirm if they are also INR chemistry.
They are decent. I would not throw them out but don’t expect miracles.
They’re likely based on NCA or NMC 811 for automotive grade cells.
its not a super high discharge battery so not more then 10 amps if that at best but does the job okay for their lights.
I’ve never heard of that before. I was just reading that ICR batteries require more care because they’re more dangerous/fire hazard than the IMR and INR, and it made me more uncomfortable.