Originally Posted by PandaBear
...
I personally just keep a spare front door key in on the car key, and go through the front door to the garage, then open the garage door manually.
The battery backup was just a bonus on mine, it was not something I was looking for, but now that I have it, my wife can't live without it.
Very nice when you come home and open the garage door, park, and only once you get inside realize there is no power.
Also our door is too heavy for my wife to lift (double wide insulated door), so if she needed to get out in a power outage, she would not be able to, now she can.
It is supposed to have like 20 open/close cycles when new on battery. The batteries are also the same type that are used in UPS backups, so are relatively cheap and easy to find.