When my friends ask me about the 360 I make a point of telling telling them about they have to buy batteries to use the controller. I am yet to hear anyone consider it a smart solution. Besides here of course..
And there's why I think part of this is a cultural difference, because here you don't have to buy batteries to use the controller since everyone has rechargeable AA's already whereas you do have to tell Sony buyers here that they have to buy another controller to be able to keep playing, or the ps3 tax as my friends called it when I was buying mine. Opposite results in different parts of the world. However I did try a search of "ps3 controller battery" and it auto completes to, in this order:
ps3 controller battery replacement
ps3 controller battery life
ps3 controller battery replacement how to
ps3 controller battery replacement wallmart
ps3 controller battery dead
ps3 controller battery fix
So given how search engines work, that implies irregardless of where you live in the world you should also be telling your friends that they will have to buy a replacement playstation controller at some point and/or a replacement battery for when they have to open the controller with a screwdriver to replace it.