Im having an issue where it seems that the DJI FPV remote controller's battery wont charge beyond 50% only 2 of the lights come on and it has been charging for at least 8 hours. im fairly confident it is not my cable because it got me to 50% and i did updates with it. Can't seem to figure it out.

Hello, there. Sorry for your inconvenience. Would you please follow the troubleshooting steps below?
1. Please try to unplug the power cable, or try to plug in another power port for cross-testing.
2. Please try to discharge the remote controller to 0 and then recharge it.
Please tell us your feedback after trying.