Have you ever been told by a professional photographer that the only way to increase your flash's refresh rate is to carry one of those frumpy battery packs that attaches to your belt and connects to your flash with that telephone cord? What if there was another way to improve your flash's performance that did not require any extra cables or bulky battery packs? I may have just come up with the best alternative yet...an external battery pack that fits perfectly inside your camera's vertical grip.
Since many of our cameras now can hold a battery inside the camera and operate without any extra battery in the vertical grip then we may be able to use the space in our grip to hold extra AA batteries to power our hotshoe flash. My Nikon cameras that use the MB-D10 vertical grip come with a AA battery tray that is used to increase the camera's shoot speed as well as the overall camera battery power for extended shooting. If we could find a company that could modify this tray (or create a new tray altogether) we could then sent the power from the batteries out to our flash instead of up to the camera itself.
This would be great! We could now have a camera that still runs off the single internal battery and have a new battery pack for our external flash hidden inside the camera's vertical battery grip. Our camera would look exactly as it did before (the only difference would be a small power cable connecting our flash to the side of the vertical grip) but we would now have much faster flash refresh rates when we are shooting events or shooting with intense flash power.
I realize this is a great idea and there is definitely some money to be made. I would love to see some company take this idea of mine and turn it into a real working product. If we had a few trays for Canon and Nikon cameras, I'm sure every event photographer would prefer this new external battery pack design over the current wired fanny pack version. What do you guys think?