In a neat little bit of digital convergence, Korean company Wigobyte has started offering a new spin on the old USB flash drive theme. The new Mvolt-200 USB thumb-drive is at once a neat little flash drive, ranging from 128MB to 1GB in size and an emergency mobile phone battery, providing about 10 hours of standby and 40 minutes of talk time off of a nifty 3.7V li-polymer battery. The device uses a USB 2.0 connection weighs in at a conservative 17 grams. A word of warning though: the battery complies with the Korea TTA Standard 2400S 24 pins. We’d bet that you might not have one of those on your phone.