As I continue to chew of the differences some people report in their flying time with loaded copters, one of te potential variables I have not seen discussed here is the possibility we are all NOT starting out with equally charged...otherwise equal capacity...batteries. I have only the stock supplied charger. If i is not giving me as good a charge...my flying times are going to be shorter no matter what, props, motors, etc., etc.. Has anyone ever noticed a difference between chargers...maybe when adding one or upgrading...amp/charging times, etc. resulting in a better charge/longer flying times??