My first question on StackExchange - I was not able to find sufficient information anywhere else, so far.
I got a bunch (~150) of used Li-Ion battery cells (see picture 1). Chemistry is LiFePO4; cell type seems to be 40138 (40mm diameter, 138mm length without connector screws); imprint on cell says "9 A 0 5 - H"; barcode reads "4BF1M331-0720"; the batteries come from electric go-carts and weight is ca. 360g +/- 5g.
Unfortunately, I have no reliable information about these battery cells concerning capacity, nominal/(dis-)charge voltage etc. I was told, the cells are not produced any longer; the follow-up model is blue.
So, my question is: Does anyone out there know exactly this battery cells and can provide reliable specifications - perhaps even a data-sheet?
I started to characterize each single cell using a battery tester and a tailored test procedure, but the first cells show highly deviating results. Since I found also a lot of different specifications online about similar (but not the same) cells, I would like to assure myself with reliable information.
Thanks a lot!