I've read some of the comics, and I think Batman, just because he's a normal guy, and also because I saw, after Dark Knight came out, that "Tech of Batman" documentary, which showed that most of the stuff he uses could be made (or already has been, it's just not fully complete yet). Also, in an actual fight, well, Batman does always carry some Kryptonite (SP?)on him at all times in a lead lined pouch on his utility belt, just in case.