Is this timer battery operated or is the battery just for backup if the electricity goes off?
1985506
Battery is for backup. However, this device is very hard to program. I would not recommend it.
1985507
I'm fairly certain it's just for backup. I selected this particular model for its ability to self adjust for length of days and daylight savings. It's doing a good job so far.
1985508
Hi The Battery is for backup. Its good to replace the battery after 2 or 3 years. Very simple to do. It is a Great switch.
1985509
Not certain. However, with no power outages to speak of, the low battery indicator went on in about 3 months. No problem if you don't mind buying $13 batteries. Additionally, the "dusk to dawn" program only half works; meaning it never shuts off at dawn. Try another product.
1985510
Regardless of what the other users say, the Timer DOES NOT use any power from the circuit as only the "hot leg" in the circuit is wired (no "neutral" white wire required or wired). The Timer uses an internal relay which performs the ON and OFF switching and operates entirely from the battery. But this internal relay (and also the clock function) uses very little current and therefore the battery should last for at least a year or two depending on how many on/off sequences you have programmed. I have four of these timers which I have been using in the "Astro" mode (automatically changes sunrise and sunset times) since last July (2014) and they have been performing flawlessly. Regardless of what the other users say, the Timer DOES NOT use any power from the circuit as only the "hot leg" in the circuit is wired (no "neutral" white wire required or wired). The Timer uses an internal relay which performs the ON and OFF switching and operates entirely from the battery. But this internal relay (and also the clock function) uses very little current and therefore the battery should last for at least a year or two depending on how many on/off sequences you have programmed. I have four of these timers which I have been using in the "Astro"... » Read More Regardless of what the other users say, the Timer DOES NOT use any power from the circuit as only the "hot leg" in the circuit is wired (no "neutral" white wire required or wired). The Timer uses an internal relay which performs the ON and OFF switching and operates entirely from the battery. But this internal relay (and also the clock function) uses very little current and therefore the battery should last for at least a year or two depending on how many on/off sequences you have programmed. I have four of these timers which I have been using in the "Astro" mode (automatically changes sunrise and sunset times) since last July (2014) and they have been performing flawlessly. « Show Less
1985511
The battery is there for backup in case of a power failure. We selected this model specifically because it will not need frequent battery replacement.
641043
Batteries are a back up in case your power goes out to the circuit. It keeps the time and the settings you have programmed. As long as the electric is on, the batteries do nothing. It's when the power is off to the circuit is when the batteries take over to keep your settings on the timer. However the batteries will not turn the lights on or off. It only keeps your settings when the power goes off.
817503
Since I gave it as a gift, I had to contact another person. The timer takes one AAA battery. Have a super day!
1197433
If you lose power will not come on when power is restored. Never used the timer feature.
1735764
You plug it in a normal outlet. You can only have timer go to Constant on, 1, 2, 4, 8 hrs.
2177980
The MT13A Mini Timer uses 2 - AA batteries for backup of settings. Do not use rechargeable batteries.
744462
Yes, This is a simple 24 hour clock timer. I wouldn't bother for short power interruptions but for long outages you should check time every once and awhile. You also need to adjust for daylight savings time twice a year.
1866190
No, but the timer only uses 1 AAA battery. If you'd like though, the battery is easily accessible so you could just take it out when you wanted to "turn it off".
548433
It is not battery operated. It does plug in to a wall outlet and has a remote control. I love mine.
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.
1535114
Our power went out for an hour last week. The timer did not have to be reset after the power came back on. Also, I found it easier to program the timer if I plug it into an extension cord to program it, and you can disconnect it to plug it in directly to the power receptacle on the wall without losing the programming (if it is fully charged).
1972870
It's battery operated. But don't worry, it doesn't work with batteries, either.
1735765
It just plugs into a standard outlet. You cannot program it for anything other than the times shown. It is a simple button push to move from onesetting to the next. It is not a repeating timer either. It completely shuts off when it times out.
1852955
This model is wired with a battery backup. You are better off with both power sources as you always have alarm protection.
1188925
Its has a built in battery. Nothing to worry, all data will be in safe for longer time period. I can't say exactly how long. But I can tell you a clue. It took 21 days to come this unit by post to Sri Lanka and at the time of receiving power is ON. which means this will last over 21 days without any problem. But There is one thing I could't check.. Most important thing. Most of the timers have that issue. If the power goes off when it is ON state and power resumes after OFF time. It will resume the power back because its relay is already on and couldn't go to OFF status when there is no power. In that case it will work when we don't want. So it is a problem for most of the times. So far never seen a one which will override that issue. Unfortunately I couldn't test this unit for that fault. Thanks !
599195
It neither has a timer nor an on/off-switch. It is operated by plugging it into the outlet to start it, and plugging it out to stop it. In this sense you can time it by purchasing a timer-unit for a few dollars to put on your outlet.
923280
Rian Ketter is correct. The timer is optional. I have used the timer only because I occasionally forgot to turn off the heater before I went upstairs to go to bed--and was way annoyed with myself when I came down the next morning and the thing was still running. Waste of electricity!