Why does the wired battery supply not work?

When I place the wired battery supply and screw on the cap it the LED my flash but it does not stay online.

Answer

The reason this happens is due to the battery and wire. When the cap is screwed on it will push the battery past the terminals and lose power completely. 

A simple fix is all that is needed. 

  1. Take a tool (screwdriver, pen, or paperclip) and bend the terminals inwards to catch the battery. 
  2. Screw on the cap.