Sounds to me like you cross connected the battery on the 35a esc and fried it. That's why it's not working anymore? What are the cell voltages reading on the charger when you try to charge? My guess is that your running the pack down too low which is fooling the charger into thinking you've got a dead cell or something. I don't know much about the 2nd esc but if it's a hobbywing base then the HW program card may work. Hook it up and see. Won't do any harm.