During mid-flight I am getting an error that says “unknown battery”.   

Anyone know what this is about?

Hello there alc0. I am sorry for the trouble this has caused and thank you for reaching out. May we please know if you are receiving any error codes on the DJI Go application when this is happening? May we also please know if the firmware of your DJI drone and it's intelligent flight battery is on it's latest firmware as well? Thank you

The phantoms firmware is up to the date but I am unsure about the battery.     On the page I was directed to for updated firmware I do not recall seeing an update for the battery.  

The error only comes up after the phantom has been flying for about a minute or so (says “unknown battery” I believe).  

I’ll have to double check if there is an error code next time I go flying.

I get that every once in a blue moon.  Nothing bad has ever happened.  Good luck

Yeah I have not gotten the error since so I am hoping all is well.

I am interested in getting a signal booster as losing contact is my biggest fear.      Any recommendations for one for a phantom advanced?