Most the people saying it have had brown out problems when they went to 2.4 and found 6 volt to be the cure. With a plane like a Kadet with standard servos and not many of them a 4.8 pack is just fine and the new 2.4 systems aren't as sensitive to brown out. 6 volt gives full strength and speed to the servos and is a safe guard to the brown out problem. I run two 6 volt packs in all my bigger planes with a lot of digital servos and single 6 volt packs in my smaller planes. 4.8 is still fine for some planes. I went to eneloops, they are nimh but they don't self discharge, that's the only difference, charge today and fly next year if you like.