The following table shows Premium Accessory compatibility with the different GoPro camera models.

 

 LCD BacPacLCD Touch BacPacOriginal Batter BacPacBattery BacPacWi-Fi BacPac3D HERO SystemDual HERO SystemWi-Fi RemoteSmart Remote
HERO4   X   X       X X
HERO                  
HERO3+   X   X     X X X
HERO3   X   X       X X
HD HERO2 X L X L X X   X  
HD HERO 960                  
HD HERO Original X L X L X X   X  

X = Yes, compatibile

L = Limited compatibility

Limited compatibility explanation

There is limited compatibility for the LCD Touch BacPac with the HD HERO Original and HD HERO2 cameras.  The LCD Touch BacPac touch interface does not work with these cameras, but you can control it just like you control your original LCD BacPac.  The camera's Shutter button is used to select menu options, and the Power button is used to cycle through menu options.  

The Battery BacPac also has limited compatibility with the HD HERO Original and HD HERO2 cameras.  Pass-thru charging is not supported, which means that you'd need to charge the Battery BacPac and the HD HERO camera's internal battery individually.