No, again, forget this idea about acid.Make a hole in the batteries (use the strange tool) so that you can acquire the battery acid, then use the acid to (hopefully) dissolve the metal box enough to see what is inside.
Well, he can try...Put the metal box near to one of the lightbulbs of the room of below and keep waiting.
![Image](http://i39.tinypic.com/aue3yo.png)
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![Image](http://i41.tinypic.com/1249fti.png)
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![Image](http://s017.radikal.ru/i432/1305/af/acb9729360be.png)
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![Image](http://s42.radikal.ru/i096/1305/d5/3e81559759f5.png)
![Image](http://s019.radikal.ru/i638/1305/38/d0a5264f7f63.png)
NO. It is useless.
<And just in case: Not all items should be used. And some of them that weren't used before, still shouldn't be used! :P>