OK, so if you have ever run your triple a batteries down and for some strange reason you still had a fully charged 9 volt battery available (like anyone buys 9 volts these days) then you could conceivably hack the 9 volt and use it to run your triple aaa battery powered devices.
Do I recommend this? No Way!
Do you want to experiment and see if its possible? Do so at your own risk!
Regardless this little tutorial is rather amusing and a nice break from my normal writing.