No. The button works (I have a fake controller).One way of figuring it out is that if the reset button works then it is genuine ?
Using dshidmini's GUI will tell you if the thing is fake or real
Here in Brazil there is some counterfeit ds3 impossible to distinguish from a real ds3 without open it. To avoid to buy fakes, I only buy the mexican model, because usually fakes are from usa/european models.usually, at least from my experience with fake controllers for any console, you can usually tell just by the feel of things like the buttons. after having not used my gold, fake ps3 controller for a while, the buttons have started to stick for some reason. it's almost as if they're stiff. my led controller has no issues though. I also bought a fake wii u pro controller once, and I could tell by the size of the box (slightly smaller), and the feel of the dpad (felt cheap).
Here in Brazil there is some counterfeit ds3 impossible to distinguish from a real ds3 without open it. To avoid to buy fakes, I only buy the mexican model, because usually fakes are from usa/european models.
Forgot to mention about the USB handshake: probably this is a secure way to check if it's fake or not.

How to spot a fake PS3 controller without looking at the insides ?
when you move the stick on official controller it will follow you and feel like its conforts when you move the stick on fake controller it will not follow the same you will feel the stick harder i mean if you move a little to the right you will see stick go to most right same for other directions,i hope you understand what i mean but put it in my mind this is only my opinion
well for me i know its official controller when i use the analog sticks
this an exemple :
there are some games when you like you move the analog stick slowly like you walk in real life like watch dogs or any game
when you move the stick on official controller it will follow you and feel like its conforts when you move the stick on fake controller it will not follow the same you will feel the stick harder i mean if you move a little to the right you will see stick go to most right same for other directions,i hope you understand what i mean but put it in my mind this is only my opinion
Almost sure it is. Could you please take some pictures of it?OK, I received a DS3 today...opened it up and the battery is one of those blue ones...DSHIDMINI also reports that it is fake....is it really fake ?