BUMPADOO!!!
He's wrong, I just didn't want this asshole buying from me.
I was professional to him, from the perspective of running my eBay store, rather than as someone on the forums. So, I offered a partial refund, which he strangely refused. I think, back then, the battery wasn't even dead (I'd actually played the game about 3 months prior, and professional mode was unlocked, which required the battery.) That's why he refused the refund, he was just on a fishing expedition to figure out it was me. SURPRISE! IT WAS ME THE WHOLE TIME!
Funny enough, he also bought something from a local friend and threw an absolute tantrum, and after that I blocked him.
It's ironic too, because in true ProfProf form, he didn't say that the battery was "leaking" until after I had blocked him.