Purchased an used Phantom 4 and found out the controller was not fully charging. After some searching found several threads about this being an manufacturing defect and that others had their controller replaced for free out of warranty, After doing a chat with support I was lead to believe they would do the same for me. Sent the controller in for repair and was expecting either an no cost replacement or an quote for about $200-300. They are replacing the controller for about $70. I am pleased.... Thanks DJI!