i charge my 1320 at 1. then next time i charge at .500 then next time at 1. ect.
always lasts 15 min. or more and logged 200+ uses on her ,still going strong
i never fly more then 15 min. per pack just to be safe........ heres a picture of where i fly at ...... [link=http://earth.google.com/download-earth.html]google earth[/link]