After 2,500 trouble-free miles my E3 has developed a major problem. On a very regular basis without any pattern I can figure out the power just cuts out. Sometimes the screen goes dark, sometimes not. Often the battery sate-of-charge lights goes out as well. A complete re-boot will almost always solve the problem but often for only a second or less, you don't get far. Other times you get 15 blocks, but usually 2 or 3. Bike isn't usable at this moment. Sometimes just before failing there is a vibration/grinding/resistance thing that happens. Because the battery lights go out I'm assuming the problem is in the battery case, there are some electronics in with the battery.