How long do the batteries last?
1662311
The batteries are meant as a backup in case power fails as I believe it often does in case of fire. In my house I've rarely had a power outage so I'm not sure how long these units would work on battery power alone. I replace my batteries every year.
1662312
All smoke alarm batteries should be changed every 6 months according to my fire department. It eliminates them beeping during the night as the batteries die down. Some other models offer batteries that last ten years- very expensive but may be worthwhile if the alarm is out of reach such as in a great room ceiling.
1662313
I change the battery at least once a year. When the alarm went off the first time a few weeks ago, I checked the battery first. It showed a good charge using my meter, but I went ahead and changed it anyway. The alarm has repeated to go off since the first time, several times a week. I took it down and will replace it with a different product.
1662314
I just replaced the OEM battery for the first time due to it's beeping alarm reminder. For once it was during the day. It lasted 22 months.
1662315
I have only had these alarms installed for 6 months, but the standard fire department recommendation of 6 months is most likely overkill for a device that is direct wired. No power is being expended unless you lose power to the home. Most likely as another person answered, you should get 2+ years out of the battery.
1662316
They should last a long time as the unit is direct wired to 110 volts. So it's based on the shelf life of the battery. I have several direct wired smoke detectors and I only replace the batteries when one of them is low, then I replace all of them. batteries. I expect the batteries will last over 2 years.
1878767
Not long. about 15 mins. of run time. I bought a second battery so i could easily swap them out and keep going.
1622218
Really couldn't say - I use these infrequently. I will use them nightly for a week or two, then turn them off. Only use them on dark winter evenings. Still using the batteries from last year, therefore. So - I will hazard a guess that they last a long time, maybe several months if not used daily.
564785
Well we have had them for almost 2 weeks and one has never been turned off and is still going strong. We haven't used them as much as we thought though. So even though the batteries have not died with it being on I still wouldn't be able to tell you how long they last if you're using them consistently. Overall I would say they conserve the batteries well.
1289226
Regular batteries (AA I think) and they last a pretty long time. I've had my first set about two years now and maybe have replaced batteries once, maybe twice. Wear them an average of 9 -12 hours a week.
2134784
It takes 2 C Batteries, they last a long time, we just go to the dollar store and buy them, last 3 to 5 days.
1202669
Tough to answer. Length of time in use and volume will impact batteries. I often use it 4 hours a day and they last about two weeks.
940955
They run on batteries. I had have them for more than 6 months and still on the original batteries
1885221
it depends on how long you play it, but most of the time the batteries last for about 2 to 3 weeks. It also depends on the type of batteries you buy.
358967
I'm still on my first set of batteries I put in it (2 AAs) and I'm amazed they've lasted this long. I've been using it off-and-on both day and night. The other night I fell asleep with it on and expected the batteries to be dead in the morning. They're still going! I turn the radio off when commercials come on so I'm sure that helps, but still, I've been pleased with battery life for this radio.
555189
Batteries will last 20 to 40 hours depending on factors such as quality of batteries and if headphones are being used to save power.
743031
My experience is that the batteries last approx. 4-5 hours. I use mine for work and I love it. Problem is I found the exact light at a boot store a month after my purchase from Amazon for only $4.95!!!!!
2105314
I use the Duracell AA batteries and I believe it takes 16 total. They last quite a while depending on usage.
1864152
Yes, batteries last around 6-8 months. Two AA-'s in the motion sensor and the speaker plugs into a wall outlet.
605614
I've had mine about a month now and I've used them for at least 20-30 hours while in the backyard on battery power. The sound is good, the range I am using is about 50 feet with minimal attenuating materials between (walls, doors, etc). I'm not sure how long the batteries will last. You can probably do the calculations based on average current draw and the capacity of C sized cells.
1250519
9 to 10 hours depending on setting and batteries used. I usually get at least 9 hours using rechargeable batteries.
9090
I have had it for a few months. Use it a few hours a week. Haven't had to replace the batteries yet.