I know this is an old thread, but if you see this, I'd be very interested if this worked well. op has not been back since june 2020. Thanks. I'm giving it a go anyway. I now have an Airsense 10, but used my old S9 on flights when we went to the US (from Australia) about 5 years ago. The S9 with bat...

I know this is an old thread, but if you see this, I'd be very interested if this worked well.