docflash, my own experience as a HA wearer for 30+ years is that I can simply not be in a position where my “rechargeable” aids go dead - for any reason. Granted, I do travel with a backup pair of aids on ANY trip where I leave home overnight, but picture this: you’re in line at U.S. Customs, coming in from Dubai. Your aids go DEAD. You can’t hear a thing. No backups. You try to explain that to a Customs official and see what the reaction is … naw, I don’t want to go there.
Much more reliable to have a package of batteries on your person ALWAYS, and even mark your calendar to remind you what day you need to change them on. On trips or important occasions, consider changing your batteries a day or so earlier just so the aids don’t go dead on you.
With my hearing loss, I’d need folks to write notes - there is simply NO getting a verbal message across with my poor lip-reading skills. I actually traveled to Japan with a gal whose rechargeable aids went dead, cuz the flight was long and she didn’t have any backup. She got to Canada and said, 'Don’t anyone talk to me. My aids are dead." Then she had to get through Customs to the U.S. Very stressful.