Hey Smokin Scott,
I originally purchased this from a seller on Ebay.
2200mAh Mobile Power Lithium-ion Battery Phone MP3/MP4 - eBay (item 220402222514 end time Jul-22-09 23:41:16 PDT)
But another forum member was able to find this on Dealextreme, which blew my mind since I had searched there many times for it
DealExtreme: $19.99 2200mAh Rechargeable Portable Emergency Power with Phone Adapters.
Please visit my thread for an insight on the device. I posted a poorly made video too
It doesn't go through how to build it exactly since it wasn't a tutorial, but through out the thread, I posted my trials, tests, experiences for safety and results, not to forget assistance from kinabaloo. So if you haven't already, take a look see.
It's slightly larger than a janty I believe, by 1 or .5cm.
