Does the unit allow for battery usage?
317142
No it doesnt, it plugs into the wall. But there are ones you can get for travel.
317143
No it doesn't. The cord is of decent length though. I would guess about six feet.
1447217
No and no need to. It will be auto switch off when no activity detected for a while. Rechargeable batteries are built in and consume little power usually.
1236101
No, it only runs on battery. The battery lasts a month or more depending on use, so not a big deal.
1995028
No. It's strictly battery use. I use rechargeable batteries and it works very well.
1270669
The unit doesn't have a pass-thru so you can't charge while using this. It doesn't seem to reduce battery life so for me it's a minor inconvenience.
683108
The unit is battery operated. The one I received did not include a battery.
468960
The unit has a compartment for two button type batteries (supplied with the unit) that back up the memory if the power goes out. So the answer is: yes.
1836612
Yes. Unfortunately, the unit I received doesn't retain its charge for much time.
1258618
Nope. It's battery powered only. You have to modify its scheme if you want to power it up with an ac adapter.
1040958
I cannot attest to battery life. That would depend upon usage. The entire length of the unit is 2.75 inches.
965604
The unit is battery operated and requires a USB connection to download the gathered data. However, I had to return the unit to the manufacturer since it failed very soon after I had it (about a week).
1552057
This unit will not store up energy. It will only work when plugged in. But unit is great for intended use.
2183867
No, it cannot and the battery life is awful, the unit basically stopped working after two weeks
2137318
the unit is ac/dc.. u can use batteries. However, I have never used the battery option. Hope this answers your question
745578
Yes, it does have a usage function that will display recent usage. I no longer reside where I installed the thermostat so I don't recall the limitations. I think just day and week usage.
1723614
I leave the unit in the charger when not in use and have never had issues with battery life.
1324869
This model does not allow for battery operation. I do not know if other models might.