After our installed-last-July electric garage doors kept failing and being "fixed" by the installers, they got the manufacturer out to take a look. He diagnosed low batteries in the remote device attached to each door which detects obstacles as the door is closing (roller door). (thus avoiding the scenario in that commercial that shows the kid using the garage door remote instead of the TV remote and bashing his Dad's car's roof 50 times).
Failed again today after less than two months of the "new" AA batteries. So I replaced these "new" batteries (BB: 01/2021) with a couple of unused Pannies that were kicking around (BB: 06/2012) which were still both over 1.5V. The replaced ones show 0.5V and 0.9V respectively. Hope these last a bit longer.
The device on the door is smaller than a TV remote and should be taking next to no power. But if the door controller can't contact it then it won't move the door, just beeps instead.