Battery FS trigger at first arming second arm no FS

4.6: Battery monitor failure reported to GCS, triggers battery failsafe but does not take action

Seems like I have a Battery failsafe everytime I want to first-time arm the FPV after I connect the battery. Both on Lipo and Li-ion, I calibrated the battery monitor using battery volt meter as Andy Piper used on his YT video series
When I disarm again after the message and beep, the quad arms normally.

Any idea what can trigger the FS at first Arming?

Thanks

Battery failsafe (FS) triggers on first arming due to low voltage/current on second arm, it doesn’t trigger possibly because voltage recovered or FS condition was cleared reset.

Do you have a log file, preferably with LOG_DISARMED enabled?

For professional reasons I cant sent logs. it are all full charged batteries. And voltage and current are calibrated.

Then all we can reasonably do is point you to the documentation and have you sort out what’s been missed:

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