Ride home would have been uneventful. Except I noticed my headlight was unusually dim. Umm, okay, that's odd. I'll have to check it out later. Then it dies. Hmm, that's not good. I figure my battery must have run out of juice. But I charge it every night for the prescribed amount of time, and my commute is under 30 minutes! Sure enough, somehow, I must have tripped a circuit breaker a while back, and I slowly managed to drain my battery. Oh well, recharging it tonight, and we'll see how it is in the morning.