what's the battery and how often do you change it?
68827
It takes two CR 2032 watch batteries. Depending how many times a day you use it, probably at least a year....maybe longer. It will indicate when the batteries are getting low.
658448
Hi Brad, We got the unit in 2/2013 (btw: SUPER EASY to install)!! We have not yet had to replace the battery; but, we do not use the unit every day (maybe only once a week). Hope this helps a little.
770666
I have had mine for 3 months and have used it once or twice a day since then. I just changed the batteries in it today. So depending on you use I would say 2 to 3 months.
525958
I replace the battery itself every time I replace my vehicle battery. About 6 years. They still seem to have enough power to sound the alarm but I change them anyway.
1768663
I'm not entirely sure on that. But I've been using mine for a 3-4 months and haven't replace the batteries once. I use it on the go, so I turn mine off between uses, but I have forgotten to turn it off from time to time meaning it's on for 24 hours or so. Still have not needed new batteries though. Hope this information is useful.
110343
You change the battery, I got mine cheap from Amazon also, my first battery lasted 5 months of constant use
1406468
I've never needed to replace it but it's an L1028, A23 battery. (I guess I should update my review to say that it's been in use constantly and the battery is still fine.)
264422
Depends on usage. About one to three months. Replace battery when its weak.
2193926
I have never changed the batteries...It has worked well ever since we got it. That's been about 4 months now.
587801
Sorry to say I have never changed the battery. Its not written in the instruction sheet nor can it be found on the web. It just says battery is for back up.
9092
I can't say over the long-term, but I have had mine for three months, I use it everyday for hours at a time, and I have not yet had to replace the battery.
359272
I live on mine, so I end up having to change batteries about every 6-9mo. I have 3 of these, each on a different machine.
414631
I have had the unit since May 2012 and have had to replace the battery once. However, the battery is the "coin" style battery and can easily be replaced. I hope this helps.
1838279
I just change the batteries and don't bother with the other stuff. batteries last anywhere from 2 weeks to 3+ weeks depending on how much I use it.
1001278
You can use it as many times as you want. The battery is the only thing that needs to be replaced. My battery lasted roughly 2 months of HEAVY usage. The device will let you know that the battery is low when maybe 5% charge is remaining.
197250
Good question. I never had to replace battery since it is rechargeable. A personal bad habit is that I watch tv all night. So I've experienced normal charge can last over 12 hours of continuous use. Then it recharges during the day while I'm working. Also on weekends I use it during the day as well, but between uses I slip it back into the charger. I hope that helps.
1738832
Quite a while. It's just a AAA battery. When the radio starts coming through its time to change it.