Well,some of us from multirotors know these as Multisags Tridge.Useful weight saving over higher discharge packs but not exactly as cute as a kitten.I’ve had balance leads dissolve (they just disappeared one night) but not had one let me down yet.It can get a bit scary monitoring the voltages on one of these when in flight though (as you’ve found) but they recover very quickly once landed.I’ve not heard of one letting anyone down due to low voltage but I don’t get out much.I’ve switched to the Turnigy Graphenes for my bigger copters.