does this require AC power? There is the option of a backup battery, but can that be used as the primary power source, and if so, it lasts how long?
810291
It does require AC power.... unless you purchase the rechargeable battery. About $70. I did not use this long enough to know how long the battery would last. I use an invisible fence and the dogs (already used to doggie doors) sensed the power to the door. (I had it is fully open mode) and the dogs would not go near it. They would not use it taped open as recommended for training. They fought anytime I would force them through the door. I removed the Passport door and put the old doggie door back in and all is fine. I would not recommend this if your dog is trained for an underground fence.
1816890
This unit requires a power source. I would not purchase it. I have found better that would work for your application.
2172625
Require power source of 12v DC. Could run on a 12v rechargeable battery pack not sure how long depends on battery pack.
1483795
No battery backup as the other responses indicated already. It's worth mentioning that there is some sort of memory function so that it "remembers" the temperature setting when the power does come back on.
1026917
You have to plug it in the AC wall source.. NO battery is present.. Be careful because I received a Chinese version and software can't be changed to English or Spanish ask first. This have several functions..,,,,
1733753
Thanks for your question. This unit is not battery powered. It runs on AC power and comes with a 6' power cable and AC adapter. It is a wonderful sounding unit.
1212823
it must be plugged into a wall socket. Or if you have a power inverter you could use a 12vt outlet. It does not have a battery in it.
22414
Yes, it does need a power source and comes with the cord. Probably would not work for you. It is a nice little unit though.
853076
no external power source, it does plug in and run from any 120 volt outlet. hope this helps
1637110
I'd say ~ 5 hours although I never waited until it fully died but after 5 hours of playback the display showed the warning that the battery was almost empty. Yes, AC source works fine.
2077227
There is no AC power cord for this. It runs on 2 D batteries and that is your only option as far as power goes.
1424664
This radio only runs off AC power (120volt). I can not remember if it has battery back-up for the clock. OBTW this is a very nice sounding radio with the ability to work from a number of sources .
627052
I am unsure if there is a battery back up, I will check. We run ours from an AC adapter.
1029820
You must supply a power source, so battery backup would be a good option to think about.
2216364
It can be powered by 4 C cells or from the 9V AC adapter. I believe they allow you to use both at the same time. In this case if the AC fails, the batteries will provide power. No battery charge function, is included, so non rechargeable C Cells are to be used I presume.
1344516
1) no. 2) I have used a battery pack and it charges the camera's battery just fine 1-4 hours and during this downtime you cannot use the camera till it is finished charging. After my purchase I contacted the company and asked several questions also made a few recommendations as a customer that could make the camera more user friendly etc. No response! I am currently researching for another camera that will fit my needs and use this one as a backup or spare.
770707
There is a small "backup" watcg type battery but it is not a rechargable one. Although I am happy with this unit, I do not recommend it if you are wanting to use it without a power cord.