Korean Wigobyte Co., Ltd. offers the Mvolt-200 USB Thumb-drive with built-in Mobile Phone emergency battery.
The Mvolt-200 has a 3.7V Li-polymer Battery built-in that delivers about 40 min. of talk time and 10 hours of stand-by depending on the phone. The phone connector complies with the Korea TTA Standard 2400S 24Pins. Not sure how many mobile phone brands support that plug.
The Storage on the Mvolt-200 can reach from 128MB to 1GB. The USB 2.0 drive measures 56.6x26.1x14.1mm and weighs 17g. I guess they look for distributors or OEMs to sell this gadget.
More details on Wigo's site.
Don't Miss: Incredible Pokemon Gifts
Don't Miss: Sam's Club Black Friday 2016 Details