https://www.theregister.co.uk/2017/08/22/dji_spark_brick_threat_1_sep_firmware_update/

Hackers have boasted that DJI's latest Spark drone firmware update was bypassed in mere hours – including downtime to enjoy the recent solar eclipse.

DJI has announced that its popular Spark consumer drones will be bricked by September 1 unless users download the latest firmware update.