Hi..Just finished latest m100 firmware update using Assistant 2. All updated ok. But I now have a number of batteries( unknown firmware level) that I need to update to latest battery firmware. Do I use DJI assistant or do I use SD card in the X3 camera slot? The Manual mentipns updating batteries using the X3 SD slot but is not clear whether DJI Assistant updates batteries? When I restart M100 with additional battereies...I am getting no feedback from DJI assistant on whether batteries need update?