One gotcha to add: Remember to turn off the AVP between charging it at home and using it on the flight. You do this by "choking" it, i.e. pressing both buttons

One gotcha to add: Remember to turn off the AVP between charging it at home and using it on the flight. You do this by "choking" it, i.e. pressing both buttons physical for ~10s, to bring up the "Power Off" dialog, so it's really not obvious. I once had my AVP completely discharge between charging it one night, and wanting to use it on the flight <24h later. I'm guessing that the motion from the packing and trip to the airport was constantly waking it up, draining power.