Original post by: Greg R ,
Feels weird to answer my own question, but figured I'd post for the benefit of those who come here with a similar problem. The answer is, YES, in this case, the battery continues to perform almost normally. I completely dismantled the phone, cleaning with 99% isopropyl alcohol, noting how amazingly fast corrosion & crud appeared on some components. I reassembled the phone, inserting the aforementioned battery, and it booted right up. The LCD did show a weird bubble effect from lingering moisture, but that has cleared significantly over the last few days. My son indicated the battery does lose its charge faster than it used to. I'll order a new one the next time I need to pick up some parts, but we're finding this one to still be quite usable.