The design team found that a core benefit to commuters would be the ability to see battery life as a real time indicator of how much power was left.
Focusing on this need, IDC developed a clever battery interface that was able to display the actual time left with power. Using an OLED display, the Eagle 600 was designed to instantly recalculate charge remaining when power outputs were altered between light beams. This was made even more convenient by charging by USB.