The C-271 is an electric bicycle based on the early board track racers of the 1910's and 20's. The frame is a modified Road Master that was stretched to accommodate the battery. The handcrafted tank houses a 48 volt battery along with the controller. The drive is a 700 watt hub drive motor.
For a more in depth look, the good folks over at Electric Vehicle Rider did a nice write up on it.