Just curious if anyone else has run into this. After a few weeks of great riding, as I was going down a pretty steep hill (using the hand brake), the unit just turned off. This had happened twice before, but simply disconnecting and reconnecting the power cable from the controller to the battery solved the problem. This time, no dice. I performed the battery test which indicated the battery was bad. I shipped the battery to Electric Cyclery and they reported a bad fuse. When I plugged in the fully charged battery with the fuse replaced and pressed the controller, it came on for a few seconds and then crapped out again.
I'm hoping someone can steer me in the right direction - I'm hoping to avoid a long drive up to Laguna Beach.