How does the Nest power itself? Does the nest require batteries or does it just get power from the wires themselves?
164250
This type of connection has worked perfectly for a year in our home, but we installed a Nest in a second home, only to discover that it gradually lost its charge over time, resulting in the Nest disconnecting from our wifi router. In many instances, you will need to utilize a common wire ("C") connection to keep the Nest charged and fully operable. Once I did that in our second home, the Nest started working again. This really is something that Nest should disclose up front . . . it's not an uncommon problem among Nest owners.
678339
Hi there according to the manual it takes a 9V battery.The DOGTEK® Sonic Birdhouse operates using a 9V battery (not included). Always use anew battery. Do not use rechargeable batteries.
1076112
It comes with it's own power supply and plug. This item does not use batteries.
1896346
Sorry, no idea. Assume it is like a watch battery. It didnt have to be wired. Works great...turns itself off.
543782
A wire. I can't remember if it took batteries for back up if the power went out. It's been a while since we had it.
872621
yes it does require wiring to a power source, block is just that a block with no wires.
1090112
It works very well with the second generation nest thermostat. I had it installed yesterday. The humidifer wire hooks into the * slot of the nest. Once installed you can set it to only run when your furnace kicks on or you can have it run as needed. Hope this helps!
1318957
It has a battery for memory back up, but it runs off the C wire. Be sure your thermostat setup has a C wire.
2056046
If you don't mind that the back light will not be constantly on, you can run this thermostat off of batteries.If you have the wire providing power to the thermostat, you can set the back light to stay on which is very nice at night. The batteries at this point provide backup, but then if there is no power, the fan in the house for the HVAC system wouldn't be working either. It's just there in that case to hold settings including the time and date.
1891748
Comes with its own power supply. It has a 110 AC household plug. The cord is a little short but I had no problems making it work.
942778
It works without batteries. When you pierce the wire insulation, thats hiw it gets it's power. The alligator clamp opens and you place it on metal for ground. That nakes the connection for a circuut wich activates the light.
1230799
It uses wall current and can use batteries. Wall current should be your primary source as batteries don't last very long in this device.
1275164
This Ynit has it's Own Power Source and Requires a Separate Plug-In. Buy this Unit; It really works!
2220753
It comes with just the black and red wires coming out of it. Get a switch. With or without a relay. And wire to the battery. It works so good.
274536
It didn't end up working with my house because you have to wire it in. I thought it was battery operated. Sorry!!
2052918
The base is power by an A/C adapter and the 2 wireless units use a 9 volt battery. If I recall correctly they came with a 9 volt battery that had enough charge to test the units with.
1871609
The answer is both! You can power it with batteries and it does not need power from the appliance, such as my pellet stove that has only two wires and does not supply power. Or if your appliance does supply power - hook it up and save on batteries.