How to Fix Dead DJI Spark Batteries with a 9V Battery, CP2112 Board, and DJI Battery Killer (Works for Other Batteries Too)

Drones Technical Discussions Forum
21

I used this method to bring back my Mini 2 battery, which had 0 cycles. But I keep having to clear PF/PF2 errors every time I leave the battery outside the cradle/drone. Is this normal? Any help would be appreciated.

22

Where can I download the Battery Killer app?