If it was recycled it is safe to assume that the TB/Magsafe cable went bad on it as it happens on pretty much every TBD. Spares are available though and the replacement is not that hard, there is a guide on ifixit.com You can only use it with TB2 and TB3 macs, the latter ones require Apple's TB2 to TB3 adapter. I am using a TBD with my M1 MacBook Air.
Hello there! I can confirm that CR1 is an 1N4001 since I fried mine and just replaced it.