Well, we're talking post-WWII, so Batman was pretty well-established by then. At the very least, he'd been clearly defined by then as a hero who had a ton of gadgets and equipment, but radio Batman didn't use any. I mean, right after the sneeze incident, they fled the bad guy's mansion and then tried to sneak back in through the pitch-dark cellar, and Batman struck a match so they could see. He didn't even have a lousy flashlight. Jimmy Olsen had a flashlight, a "fountain pen flashlight" that he used in several storylines, but Batman just had a freaking box of matches. Oh, and then the match burned Batman's fingers because he didn't wear gloves. In the story I'm up to today, Batman and Robin were trying to rescue Perry White from a Peter Lorre-esque racketeer's yacht, and after they got their hands on Perry, they retreated -- into the same cabin where he'd been imprisoned. Which accomplished nothing beyond trapping them until Superman could show up to save them, which was pretty much the Dynamic Duo's go-to move. I guess it's understandable that the writers wanted Superman to be the main hero, but still... Well, maybe I'm being too hard on radio Batman. Really, all the characters on that show were pretty bad at what they did. I've never known another Clark Kent who was so terrible at keeping his secret identity. He's constantly talking about doing things only Superman could do, or telling people what he sees through a door with his x-ray vision, or flying somewhere to meet someone mere moments after they called him from another city, and then stammering uselessly when they question how he could possibly do these things. And the only reason Lois and Jimmy and Perry never catch on that he's Superman is because they're even dumber than he is. Batman only knows because Superman told him. Granted, the show was made for kids and written on an appropriate level. But it is kind of hilarious how Clark has been concealing his double identity for so many years but still hasn't learned anything about how to do it effectively. Whenever they do a storyline where someone threatens to expose Superman's identity and narrator Jackson Beck intones about the risk to "Superman's most closely guarded secret," I have to laugh, because constantly blurting out your secret and then trying to backtrack or stammer out an excuse isn't my idea of close guarding.