Does this item have a backup battery to protect settings in a power failure?
814842
It does have that feature, but it will not work properly if the batteries are not maintained.
1934570
The one that I bought came with a battery backup. When the power goes out the battery keeps the exit light on and the two side lamps go on.
1500191
Not battery operated. Does have battery backup, in case electricity goes out.
1704630
The battery is a backup in case of power interruption. From a practical viewpoint you need a low voltage power supply.
1194425
There is no battery backup, however the programming is retained when there is a power outage and when the unit is disconnected.
548853
No. It does not have battery backup. During a power outage, it will need to be manually disconnected to allow opening or closing of the garage door.
2235242
If you're having so many regular power failures you should have backup power anyway since that kind of thing is really, really bad for your system. At some point you're absolutely going to lose data or your system will become unstable. - Trust me, I work in IT.
1426897
Yes. It comes with a power adapter and it is required for normal operation. The battery is for temporary backup in case of a power failure, and would not last long.
1811687
It has been a while since installed it but it uses a mall backup battery which I did test. I forget how that I tested it.
1496227
I looked at the manual online and it has a backup battery that keeps the clock and alarm running, but won't power the speakers or radio, which is a disappointment. I hope that helps.
1520503
No,There is no battery back-up, but it is very easy to reset time . The unit has saved me a lot of $$$$$ .I have my hw heater set to come on 2 hours a day.
401587
Yes, once the unit has been plugged in and charged, it has a back-up battery that will preserve time and settings during intermittent power outages.
1058711
I does have a power cord I do not know if it has a back up battery.y husband just looked and didn't see one. Hope that helps you.
507978
I have had several brief power outings at my house and I have not had to reload the settings. You can save a config file to your computer in case you need to restore it to make it easy.
723329
The power supply is an option. It uses a 9 volt battery (not supplied - no surprise there). When the power supply is used, the battery functions as a back-up.
1045165
No there isn't a battery backup. The phone will still work during a power failure; you can dial out & receive calls, but the display will be blank & the other keys will not work until power is restored. Hope that helps!
641042
Yes, so long as the power stays on it retains its clock and timer settings.The batteries are only to preserve settings in case of a power outage.