One of my last long distance rides turned out to be grueling.  It started going sour when I noticed my phone battery level was getting low.  In a pinch, I used the battery pack that supplied my helmet camera.  That kept it alive for the remainder of the ride.  I wasn’t as lucky with my main pack.  It seemed to work but the charger stopped.  To add insult to injury, I then had to haul the dead weigth.  It turned … Continue reading External USB Power