RTC not holding time

Using tutorial example, RTC is not holding time after unplugging power and reconnecting.
Its holding after reset.
What could be wrong?

what are you using for a power source? battery or super cap?

You are scaring me, I just shipped board with RTC added in rush but have not checked that. Are you using back up power for RTC? (Battery or capacitor?)

Nevermind, it was an issue with the battery holder :face_with_monocle: