DEAD ON ARRIVAL
You have inserted the battery into the quad and nothing
happens, no lights, no noise. This is known as CDOA or
Completely Dead On Arrival.
A few things can cause this issue.
Best case scenario is that you have forgotten to
remove the protective foam pad over the Deans T
connector. If this is the case then simply remove the pad
to make it look as shown.
However, if you have forced it in then there then
you may need to clean the contacts of the battery