OK, I just read this elsewhere (another site) :
All the charges were pretty much uneventful, once I learned how to properly work EA chargers: plug in first, wait for CC screen to show on charger (about 20 seconds, after "initializing" box shows), THEN swipe in the app (I got the $4 membership). Any swiping too early caused a fail and I'd have to move or wait and try again. EA support was NOT helpful in this regard: every one of their reps told me to swipe in the app "within a few seconds" after plugging in. That doesn't work. You have to wait. But you all know this by now
Sorry i didn't post this before your trip, but the original was posted about an hour ago!