It's all in the battery redudancy and how much current draw there is. If your voltage goes below 3.7 then the receiver resets itself up. Just like the problems some others have had with the Spektrum. BTW, I have both systems and am very please with how both are performing.

Chris

P.S. Graupner would not invest a penny in something that is not good to sell. They WILL NOT put their reputation at risk!!!