Deathadder v3 pro battery issue

I did a scroll wheel encoder upgrade yesterday and got a TTC gold encoder and soldered that in to my deathadder. The scroll wheel works fine and is very tactile and chunky. I like that.

But I've got a new issue now. It doesn't work wireless anymore. When I plug in the usb cable it pulses red and the moment I unplug the USB cable, it dies. So I opened it back up and unplugged and replugged the battery wire and the led wire and that seemed to fix it. I was able to play games wireless for a few hours last night and even today for at least an hour. But then suddenly it just stopped working wireless again. And it's back to pulsing red. I tried the unplugging and replugging the battery wire and led ribbon cable again and it made no difference.

What should I do now?