My flight arrived in Paris slightly ahead of schedule. I passed through customs and security without delay, then ordered an expensive but worthwhile “little breakfast” of coffee, orange juice, and a croissant. Our host for the Paris trip, James, instructed us to take bus 183 to Camille Groult, then walk a few blocks to the house. I called to say that I had arrived on time and was on my way. Moments later, my phone ran out of power; three days of maps and Wi-Fi without an opportunity to recharge had drained the battery.