A post I summited on Agoracom awhile back: I was at Pebble Beach Golf Course yesterday and they had those video drones mapping the course for a game channel. Each had 6 props, the drones where around 4 foot wide. the batteries looked like 3-4 lbs each and they had boxes of them and I mean boxes of them with only a 8 minute ride each. I asked the manager of the project if he ever heard of fuel cells for light weight battery power..He said What? guess not.
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