"TSL21700A 3.6v18Wh" what are these cells in my ebikes.ca pack?

[snowshoe]

I have a lightly used ebike battery I'd like to re-use the cells from in a new project. I used it for a couple months, then it's been sitting at storage charge & cool temp controlled ever since. I can't find any legitimate seeming spec on these.

They are light purple, printed with the text in the OP. Of course "TSL" probably refers to tesla, and 18/3.6=5Ah. I assume they are genuine as I purchased them new from Grin / ebikes.ca in 2019 or 2020.

Please help me figure out the specs, namely continuous discharge & temperature.

Thanks!

 

[thepronghorn]

I doubt they're Tesla cells since AFAIK you can't get those brand new, and I don't think Grin would be putting used cells in their battery packs. Do you have a picture? Keep in mind that any datasheet will be for brand new cells not 5 years old ones like you have. The continuous discharge rating is probably similar to what Grin rated the pack for.

 

[snowshoe]

I doubt they're Tesla cells since AFAIK you can't get those brand new, and I don't think Grin would be putting used cells in their battery packs. Do you have a picture? Keep in mind that any datasheet will be for brand new cells not 5 years old ones like you have. The continuous discharge rating is probably similar to what Grin rated the pack for.

I thought that was strange, too, they would have to be grey market.

I did just finally find the receipt, and according to the product number it would be this listing (now discontinued). That Grin sku has all the right external specs like V, Ah, and type of enclosure (well, they list a 14s3p battery has having 40 cells), but says it's Samsung INR21700-50G Cells: 50g's would appear to be 10A cells. These certainly look like any of the other Samsung cells I have, albeit I don't have any 50g's.

Grin's listing says 40A bms, which for 3p could be consistent with either 10A or 15A continuous.

Here's a pic of the cells: I don't want to tear it apart until I know the cells will work for me, but note I do not see any other text on the cells anywhere.


And now with my curiosity piqued, I opened a second battery I have from Grin, I remember it being the "same" product, but obviously this doesn't mean same batch of cells. Here's those, slightly different and no "TSL"


The samsung cells I have all are printed closer to this: (this grey -30T cell one is not my pic)