Unidentified lithium cells. Charging.

[tricky74]

Today I managed to get myself some used lithium battery packs. A couple are 7S most are 8S.
The cells inside have bar codes but I cannot find any useful info.
The highest voltage of any cell is 3.2v and most cells measure that.
An 8S pack measures 25.6V.
How do I identify the chemistry and therefore charging voltage?
Could be Lifepo4 3.65v max or more usual at 4.2v.
I am taking a guess they are around 50 amp hours.

 

[Bud Martin]

Any printing on the other side of the battery?
Any thing on the BMS board?

 

[tricky74]

I have not pulled one apart any further yet.
There is no BMS it has been unplugged.