Is there a back-up battery if the power goes off?
643925
Yes, it runs forever when it is unplugged. As a matter of fact, the clock was still running when I received it.
643926
Yes, there is built in backup. I don't know how long it will last, but definitely long enough for the typical power outage. Mine has been unplugged for over a day now and the display is still working (unlike the timer itself, which is permanently off, and ready for recyling).
643927
Yes. But if the power is out your lights won't work anyway. When power comes back, however, thetimer will have continued keeping time. Hope this helps.
1430291
This radio does not have battery backup. If you have the radio set to get the time from the internet and you have wifi signal (or you are using Ethernet) the radio will automatically keep the time. If you unplug the radio or the electricity goes off, the radio will have to reset the time, date and so on. The radio will reboot and do it's setup thing when the power comes back on.
635069
For Backup in case power is lost. But, I wouldn't buy it--it doesn't work well
2103723
Hi Cynthia, A battery pack can be used. If the electric is out for less than an hour, it probably won't matter. DON'T open the lid during that time... What you want to search is "uninterruptible power supply," or UPS
963239
If it is plugged in to AC. Mine is not using battery backup and if the power goes off, the unit goes off.
1249488
No. It has no batteries to use for a backup. So if the power quits, so does the phone
1188517
This timer has a built-in battery. It will retain it's settings after a power outage.
181341
No, The battery back-up takes the place of your battery ,if it goes dead or someone tries to disconnect it. Your security car system will still have the power it needs to protect your car.
424982
There is no battery back-up. There is a large capacitor inside the unit, which will provide enough energy to get past short power glitches. The unit does not plug directly into the wall. It has a 'wall-wart', which supplies six volts unregulated, unfiltered DC to the unit. You could easily make a battery back-up, which would plug into the unit in place of the wall-wart as an extended back-up power supply. Here in Florida, the power is subject to recurring interruptions of short duration during summer thunderstorms. The unit has handled these without problems.
1029820
You must supply a power source, so battery backup would be a good option to think about.
1521352
Yes, but it has an option for batteries. I suppose it is in case of power outage.
354034
Yes. Word of warning...if the power goes out, you will need to reset the timer. Also, this product lasted about one year and died on me. Did not replace with another. Went to Lowes and bought one that is digital and has battery backup ($25) seems to work great, but time will tell
166921
mains is the primary source, then battery for backup when power is off, or shut down.
1927599
Yes, you can have a ups to plug your psu into. I would looking at the AFC BE750G Power Saving Battery Back-UPS it will last for about 30 minutes after the power goes out.
615551
yes,the laptop has a removable battery which can last for several hours without plugging in. There is no extra backup battery with this laptop. hope it will help. let me know if u have additional questions. thanks
206127
No battery backup in mine. However if the power goes out, your furnace won't run it's fan anyway. When the power comes back on, the thermostat will resume as left off. We have ours in a vacation home and the power goes off intermittently throughout the winter. The thermostat is always reset and functioning when I check back in. I really enjoy this thermostat for checking in on the house and the external temperatures remotely, and for turning on the heat before we arrive in the winter.
948316
Mine came with the backup battery included. I run it on AC power, but it is very nice and convenient having that backup battery kick in during a storm.