Can this be run off of the AC system power? Or can it be powered by battery only?
351149
Like many thermostats it is powered by the battery only (at least in my gas furnace only configuration). The battery seems to last about 2 years.
351150
Under battery replacement, it mentions that if it is wired for AC, the batteries will be used for backup, but I do not find any info in the manual showing how to wire it for AC. therefore I'd call customer service at 1-800-468-1502 or their website at http://yourhome.honeywell.com.
351151
Not 100% certain, I'd advise you calling Honeywell customer support, they are awesome & helped me on the install.
1033079
AC power is the primary source and the battery is the backup. FYI I used it for two months with just the battery and it worked fine.
1092105
No, you have to connect it to your battery or a/c. You can use the 12 volts that runs the system.
2236990
It's battery operated, however, you can also use an AC adapter, but that's not included.
619925
I never run it on batteries, mine is plugged in at all times. The supplied power supply is 5 Volts at 100 mili-Amps. I suppose you could power it from a USB power supply provided you could connect with the correct connector.
742425
It is 9V only, no battery option so u would need to purchase a 9V power supply to run it
437104
This unit is run off of AC plugged in power. There is no spot for batteries. This is a fairly big size unit maybe 14 inches H, 10 inches W and 6 inches D, roughly.
2143324
Strictly powered by the AC/DC power block. There is no battery backup. I have had it powered off for up to a month and it kept the watering schedule in memory.
1778489
No, it doesn't run on battery. It gets its power from your PC when you plug in the USB connection.
2172625
Require power source of 12v DC. Could run on a 12v rechargeable battery pack not sure how long depends on battery pack.
366520
It's battery or ac powered. Mine only was used about 6 times before it broke.
1172732
No, it is not designed to run off of batteries, and there is no battery compartment, etc. Yes, it could run off of batteries provided you have some more advanced electrical knowledge or know someone with some-it runs off of dc electrical power, the same type of power your Duracells give you. But, it is a bit complicated. You would need to "construct" a battery pack for it in the sense that you need to come up with the rated power input from some battery/combination of batteries-it is 12v 3000mA DC input (at least that is what the supplied transformer outputs to the unit)-you would probably want to use a 12v battery of some kind (or for the size you want you might get 12v out of a combination of smaller voltage batteries in series) and then probably wire up to the dc input connector or take the back off and directly wire (i.e. solder) some battery leads to the inputs on the pcb. A laptop battery might work for this application. This would of course void your warranty.
376885
Yes, it will run on a battery. I have used it in a storage area without power. It uses a 9V battery.
2190061
It's battery powered so you have to buy batteries. I believe it can be powered with AC adapter but it doesn't come with it.
766445
The unit runs on batteries only, no AC port available without modification. it has an auto shutoff, so the batteries last a long time.
489293
It can be operated off of a 12v power supply but it does not charge a battery. It does not have a permanent internal battery like many others. If battery operation is desired you just purchase them at your nearest store (size "C" I think).
1168615
This is run off a single O cable run directly from the battery. It produces AC current at 110V . There is a USB outlet as well. I have been very happy with mine, it sits under the backseat of my truck to keep my computer and navigation systems working.