RE: 2 questions (I hope this is the correct forum)
Campy,
I've been using APP (sermos) connectors on all my battery and ESC connections for a couple of years now. I use a APP crimper so have a solderless connection. I have Thunder Power 1325 and 2100 3 cells lipos and haven't had an issue. They should work fine, no need to switch over to Deans.