Does the clock have a built in battery, or must it be reset after a power outage?
1946443
Yes, it runs on a battery. Even now, completely unplugged, I can press the time button and the time comes up. (It comes up almost ten minutes fast, suggesting the internal clock is crap, but that's a whole other issue and is not surprising as it's a cheap piece of kit.)
1916747
Not sure what you mean by "reset". The on/off functions are set by mechanical stops and can only be set/reset manually. If the power goes off, the master timer stops running as will any electrical clock. When the power comes back on it will pick up where it left off. In order for it to come on and off at accurate times, you will have to reset the dial (not the stops) to reflect the correct time.
640471
We returned ours, you had to plug it into an electric outlet. Not many normal clock have a plug in...kinda of a giveaway.
1003814
Yes it does "remember" most settings. After a power failure, all settings remain except the date and time.
1557817
There is internal battery( non rechargeable) just to keep the clock going, but to control you need 12+ volts to be able to function. I guess the internal batt is replaceable.if it stays plugged to power source will go without the batt. It worked fine for me, not a bad purchase.
1507886
it does not have a battery backup, but "Power outage: The screen is blank. Only the time must be set if the outage lasts more than 4 hours; all other settings and programs are permanently saved." This is from the direction sheet. I do like the unit!
434472
after a power outage it looses memorized stations and the clock has t be reset
358114
it has battery backup in case the power goes out, but it does plugs in to a wall outlet' I love this clock because I can set 2 separate alarms for weekdays and weekends!!
108816
No, must be plugged in to operate....there is a "back-up"battery for the clock/alarm only.
91456
Yes. The clock only is displayed while plugged in. Yet it keeps the current.
1460615
It's designed to be plugged in. I think it has a battery but it's only for when the power goes out.
903975
There isn't a plce to put a battery. when I unplug it the power goes off, but when I plug it in the date/time info is correct without resetting. I don't use it as an alarm clock though.
1388850
There is not a battery to make this clock operate. It is powered by a wall outlet.
1982746
Yes, it plugs into electric and has a battery back up, our power went out the other day for about an hour and the clock was right on time.
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).
1893660
The time clock is electric with a battery back up. Great Time clock that automatically updates with time changes etc!
1524165
This model does not have a battery in it. It gets its power from the main alarm system board. If your alarm system is working everywhere else except this sensor then it would appear that the sensor is not working any more. Make sure the rest of your alarm system is working properly before replacing the sensor. It might just be a loose wire in the sensor circuit.