Does this unit plug in and use the 9V battery as a back up?
1098402
I don't know. I still haven't hooked it up. But I think the answer to your question is yes.
1098403
Yes, but I use the battery alone without the plug in power. My shop is off grid so it is nice that I don't need to plug it in.
1098404
yes,it does plug in; @ the battery keeps it operating in case of power failure.
1098405
Yes, the unit plugs in and the battery acts as the back up. Worked great for me this spring.
1781267
Yes, it does work with a 9v battery. It will not reach full potential with a 9v battery.
2242135
Yes it has a battery back-up for both units. I do not know about dual voltage. In response to others, i do not have a problem with volume and the unit has incredible range.
1108284
No... it needs a 110 electrical outlet for the thermostat. I don't remember if there is a back up battery. I don't think there is. That is a negative for me as if we lose power, my water heater won't come on! We lose power a lot where I live. :-)
1320958
I don't believe so. There is no battery back up. I haven't experienced an outage with it running, however. So if it were plugged in and turned on, it might just come back on.
474525
not sure, i use to turn on/off a 9volt battery. Im not technically an electronic master. Sorry man.
1914053
Yes it does. It comes with everything you need to hook up the backup system except a battery.
1502297
Yes, The unit plugs directly into an AC receptacle and the battery slides into the charger.
77204
Yes. I have put mine into a dry box and am able to back pack it with a small 7 amp hour battery. In my pack I also have the cables to hook up to any battery on the fly. This radio has been a great unit to have in a emergency.
1472571
Absolutely not. Unit operates when plugged . Once you unplug ,if turned on ,starts operating using the batteries.
655381
Yes. This is a very well designed unit. The prongs for the AC just flip out to plug it into the wall. The batteries seem to hold a charge for a long time. Well pleased.
1456746
My control box came with a battery back-up, I have had this unit for 3 yrs and very little trouble with it, it is a inexpensive unit, you get what you pay for.
25517
It plugs in and uses the battery for backup in the event of a power failure.
971235
I think it has battery backup. I don't remember, as the unit is with my mom at her assisted living facility.
2171730
Yes, it comes with a plug and also has a battery installed for power backup.
1852955
This model is wired with a battery backup. You are better off with both power sources as you always have alarm protection.
866736
If you have the usb cord, then yes, it just plugs into the back. Highly recommend.Battery lasts forever.