Found it, finally: http://tethercell.myshopify.com
And the Amazon link: http://www.amazon.com/Tethercell-Smart-Battery-Adapter-QTY/dp/B00ICP1J3M/ref=cm_cr_arp_d_product_top?ie=UTF8
The device wraps a AAA battery, which is bluetooth enabled. Once installed in the device, you have to access the device (battery) via an iOS app (no Android, etc. support) to turn it on/off. The Amazon reviews tell me it is a no-go at this point. Even if it was rated at 5 stars, I need a solution that will integrate via SmartThings. It would be a great idea if it had SmartThings support, but alas… 