Have reviewed all the treads on this problem. None of the suggestions have worked just yet. Any new suggestions would be appreciated. Firmware error with different versions caused the battery error, identified by the 2 center lights constantly on. That was 2 weeks ago. The battery will not power up the plane so it cannot be recognized on the DJI Assistant to correct the error. Now there are no lights on at all. No change after all night on charger. What else to try?