I purchased a phantom 4 pro battery new. The 4th light on the battery never lights up. The battery seems to hold full charge and work properly. I've flown the drone and monitored battery in DJI go app. Please keep in mind I flew the drone after I realized this was going on. Does anyone know whats wrong? Is my 4th light just dead and I "shouldn't worry about it"? Not sure if anyone has some insight on this. I'm really just fed up. I bought this battery because I had just bought a P4A and the battery it came with wasn't working! Sent that one back to dji and got this one and its only showing 3 LED lights. Its actually so frustrating that I gotta laugh about it (haha). I can now say every DJI product I have purchased (2 drones 1 battery) has been manufacturer defective... and im sure ill buy another lol