Maiden crash, you have had two answers to this question, but, I tested the costco batteries versus duracells for a brick of each. The average charge length of a set of batt's is 18. The variation it charges may be due to different charge and flight styles. If you fly the plane way down before you charge it, you'll get a longer life out of the tx batteries, but you'll have poorer performance at the end of the battery cycle. I found that the best results are yeilded by changing the batt's once they drop below 1.35-1.30v. All of this was done with a tx used only for charging. Tim

Hey all, the mono stir stick that landed on the chimney of the carriage house and then fell between it and the roof fell down today. I no longer need a 30+' ladder. I did nearly run it over though. Tim