ghosthost
Head-Fier
How about a picture of the battery? Glad they are taking care of it.
It looks almost depressingly normal at this point. I suspect the chore of freeing it from the heavy duty adhesive FiiO uses to secure it to the back plate resulted in some venting; Always do this stuff in a well-ventilated area, kids! At the moment, I'm treating it as if it were a sleeping rattlesnake and in a few days it will take a carefully supervised trip down to the local recycling center where it will meet its final reward. Or at least be someone else's sleeping rattlesnake.