Radio shack has a few adapters, but nothing as nice as these cheap little end terminals. This one is the correct size to fit most of your camera accessories with a 5.5mm OD and 2.5mm ID barrel. You can use this to make a cable to power up your Z96 LED lights, 312 LEDs, 600/900 LED Light Panels, and the list goes on and on. If you want to see an example of this cool little battery pack in action (click here).

Not long ago Luca did a test, and this battery should run the 352 LED ring light for at approx. 1.5 hours in full power. These batteries are cheap and you can get multiple ones if you need to swap. For these little end plugs, there's clear markings to show positive and negative (posi-in) and does not require any soldering. Grab two wires, strip the ends, and tighten up the screws. Make your cables as long or as short as you need.

5.5 OD 2.5 ID Power Plug End Adapter