hey guys i bought the hyperion duo3 charger, and im having some problems with it, when i try to charge my 4s packs, it will start to charge, but then it says open circuit, or connection break, so i tried different leads and different balance leads and boards, but it would still say connection break, and it also says that to my 2s packs. also when i tryed to charge one of my 2s packs today, after running it for about 8 minutes on the track, it started to charge and then it said it was finished but it was at 7.5v and i just used it. do i have a messed up charger?