I am going on a trip but I will be sitting in Economy class were there will be no AC power supplies on a B747-400. I want to take my GPS onboard (which I had done before and I used it AFTER taking off) but its only good for 1.5 hours without charging.
Is there like a portable charger which I can use to operate this thing during the whole entire flight?
There will be no AVOD (unlike on some aircraft) in which it has the real-time flight information GPS thing with the moving map. And I really wish to see the altitude and speed.
If you are cool person with flight attendants they may usually allow you to leave your electronic device to charge in the back. On my flight to Europe I charged my laptop 3 times like that. -- Semper Fi