So, I acquired a water damaged Macbook (Late-2008 Unibody / 5.1) to cannibalize for parts for my existing macbook of the same model. I've taken everything I need off it, so I'm looking to part out the rest of the components to recover a few dollars from what I paid for it. The logic board is pretty obviously fried - absolutely no life in it if I attempt to power it on.
However, the PMC seems to be intact. When I connect a charger it lights up green, then orange like it's charging the battery. The charge indicator lights on the side also come on and indicate a discharged battery (one blinking green light).
So, given that the battery may have been water damaged, but shows no symptoms of it, how should I go about testing it, and what should my concerns be? If it seems to be holding a charge in the damaged macbook, could it still damage my fully-functioning macbook if I plugged it in to test it/check the capacity?