Just received my other two batteries. Now I have a nice 3pc LED light kit on all battery power. These will work on either my 600s or 900 LED panels (Video Test Here). These batteries won't work on the 1200 LED Panels (found here) because those run on 24V.
Besides using these for the 600 / 900 LED light Panels, there are several people who use them to power up accessories on their DSLR rigs. I'm waiting for some special mounts from CPMCameraRigs.com. They design a snap package that mounts to standard 15mm rails. Coupled with a special secondary battery. You can check out some of the mounting options over at their website (click here).
CPMCameraRigs.com Tekkeon Battery Snap Packages
Literally just two days after posting about the Tekkeon back in stock, it was sold out and back on backorder status. Today I just checked (while writing this article) and it's back in stock again! These things are hot, and they'll be sold out again very quickly. Cheapest place i've found them is at B&H (click here).
Tekkeon MyPower All Battery for 600 / 900 LED Panels