gopro drone battery 0v

sold the drone awhile ago but couldnt find the spare battery
i found it at 0v
couldnt find anything about opening them up so i just ripped into it
you only need to pop the top off











cant see anything wrong

the leds werent working before but now i have 3 out of 4 on the meter



ive got power all the way upto these chips





i think all i need to figure out now is which of these wires turns on the board



black purple and green are negative
blue is positive
black and purple to blue is 14.74v
green to blue is 15.35v

twist together
black,purple and green for the grounds
touch the yellow and it powers up