This seems worth a look. I ’oogled to find out more about battery grades and found a huge amount of info about identifying fake and poor quality cells at a site called batterybro.com.
They’re a California company (at least a California address).
And they’re a wholesaler, not a retailer, by the way. So they’re a source of information, not batteries — though maybe of interest to people who do resell to us individually.
I’m curious what their prices look like from a retailer’s perspective if any of you care to comment.
There may be more value added for people who frequently put devices containing li-ion cells up against their heads and inhale.
But then again, people who inhale that stuff intentionally may be less risk-averse than us safety-through-flashlight types (grin).