Quote Originally Posted by CAMiller View Post
No problem. Average of 10,000 commercial planes in the sky, 24h/day, burning an average of 750 gal/h = 180M gal/day. At $3/gal I make that just under $200B/yr so in $ costs air travel burning at least 20x device charging.
I just checked...

'...A 2012 US study found that the average mobile phone draws around 3.68 watts when charging, and around 2.24 watts when plugged in and fully charged.

Energy company NPower claims this equates to a cost of around £3.50 per year to keep a mobile phone charged...'

I use mine much more now than I ever did in 2012 and charge it twice a day. I know battery technology has improved.

This throws your calculation out by some considerable amount - I wont go into the stats!!