Instead of building a specialized case with a dedicated battery, or drilling a power socket into the flash, Matt went for the shelf product and used one of them $6, 6V flash lights (about a dollar a volt). I always prefer off the shelf products to making something new, always. Matt then went ahead and equipped it with a 6V rechargeable battery, and a charging jack.
On the strobe side, Matt used wooden batteries to allow the power to flow. IT get a recycle time of 1.2 seconds for full pop (holdya’rhorses SB900 users, it will heat up soon enough).
Matt was kind enough to allow me to share his picture tutorial on DIYP
Creating the battery Pack
You’ll need: A flash light, a rechargeable 6V battery, a solder, some wires and an audio jack.
Creating the Wooden Batteries
You’ll need: a drill, 1/8″bit, and hand saw (or a dremel) and a Philips head screw, 1/4″ diameter X 1-7/8″ wooden dowel.
A heads up on the head of the screw …. The Negative Dummy is not so important, and could be a nice fat end …. BUT … the positive terminal might need to be as narrow as the tip of a AA battery. Some flash’s positive end is designed to be a safety, and will not allow contact from a battery placed in backwards, such as my Canon’s … If you are not getting power from your DIY battery pack, this would be the first place I would check …
The Added Bonus
To make things really sweet… The flash light can be used for focusing light at low lights scenarios. This is exactly what Matt did for this photograph