@AJ_box 

I honestly just use an extension cord, then if needed stick some Velcro tape to the AC adapter and plug end to attach to a wall if needed.

AJ_box wrote

 

I'm pretty happy with the coverage provided by my M4 system but I want to move one of my satellite Decos to a slightly less obvious location. To do this I need a longer power adapter cable. Can anyone recommend such a cable for the Deco M4? I've had a look and can't find this question specific to the M4.

 

 

  @AJ_box 

You should be looking for "CCTV power extension cable", you can find plenty on Amazon. The cable must have barrel plug size 5.5mm x 2.1mm.