danielNovet@BG255143439 if Betaflight does not see gyro-data, it will not let you arm.

danielNovet ...update... ...These packs are not worth their price and could (should?) even be labeled as dangerous! The two batteries I thought repairable were not, they puffed already from regular charging, so they had to be disposed. On the remaining 8 out of 10 packs, I performed five charge-discharge cycles. Those results are horrible, the cells are obviously not matched at all... From the numbers of the capacity that was charged and discharged, four more packs are sorted out, as more than 20% of the value is obviously added by extensive balancing. Those batteries should be used on ground-based applications and not any kind of aerial activity! When in use, due to unmatched cells, voltage may drop suddenly without prior indication and well before expected flighttime! Average flighttimes on the Emax Tinyhawk Freestyle 2 are the same or even shorter than with the original batteries, despite claimed capacity being 525mAh instead of the original 450mAh...