Control ICs
I would say the specs on the battery would be OK, Looking at the size it would seem to be a backup power supply for the instruments, However there are some fake control ICs for charging and current control on the market. I would hope they have been careful in the supply chain. I would be pulling out a few samples from the batch number they would have a few spare now for testing.
Some people have not been in an aircraft with unidentified smoke. I have and looked out the window 400kms from an airfield for a suitable landing area. Asked if we are OK I said yes everything is fine, but that was not in anyway what I was thinking.That day we got lucky.