1.

Clever Dude
April 30th, 2007 at 10:19 pm

Actually, our smoke and CO detector runs on 3 AA batteries. It’s made by Kidde. It has a nice lady saying “Fire Fire Fire. Warning Carbon Monoxide”. She sounds alot like the robot from Lost in Space.

2.

dong
May 1st, 2007 at 7:07 pm

My physics is rusty, but I recall voltage being additive. I think you should be able to hook 6 AA batteries in series to a standard fire detector….

3.

John Wilks
May 1st, 2007 at 10:31 pm

Simply hook up 8 AA batteries or 20 AAA batteries in a series to a standard fire detector. This invention should be able to run for at least 4 months straight! The biggest advantage to this is that every year you will have a ton of extra half dead AA or AAA batteries to mix and match to put into your wireless mouse, alarm clocks, diabetic monitor, etc.

4.

Gel
May 2nd, 2007 at 6:53 am

I work for a major manufacturer; reason why 9v is that so few other appliances use, so there is less chance of battery being borrowed for use in something else (less important!).
Rechargeables do indeed exist BUT are not suitable due to their dischrage pattern. Standard alklaine or zinc batteries will gradually deteriorate over 2 or 3 years; when voltage gets to low trigger warning level (around 7.5v) alarm then has to beep for 30 days once a minute(to tell you to change it); this so complies with product standard. Rechargeables when they go off, drop voltage like off edge of a cliff, so won’t give the all important 30 days protection.

5.

broknowrchlatr
May 2nd, 2007 at 7:45 am

Rusty is right, voltage is additive (when run in series). It actually does make sense that smoke detectors are run on 9 volts. AAs and AAAs are 1.5 volts. So you need 6 of them to make 9 volts. Is 6 of those really cheaper than 1 – 9 volt?

Here is how it works. There are 2 components in electricity. Voltage and Amperage. My analogy is comparing it to a river. Voltage is the speed of the river. Amperage is the width of the river. If you put 2 batteries in series (in a line), you double the voltage. If you put them in parallel, you double the Amperage (since it is like you are doubling the width of the river.) You can test this on your own. Get a small CPU fan. Hook it up to 1 AA battery and test the speed. Then put 2 AAs in a row and note that it will go faster. If you put two in parallel, it will probably not be faster than it is with 1 battery, but you will be able to run a larger fan.

If you have something that doesn’t take much to get going, but you want it to go really fast, you need high voltage, low amperage. If you have something really large that can go slow, you need high amperage. Look at children’s toys. A small child’s toy that jsut makes noise and has blinking lights will likely run on a couple AA batteries. A larger toy with moving parts will more likely run on 3-C batteries. They need more amperage ont he same voltage (C and D batteries run at the same voltage but higher amperage than AAs ans AAAs).

9 – volt batteries are purely for electical speed. Thus, the 2 most common uses are smoke detectors and controllers for RC cars. The former needs higher voltage for the high pitch squeel of the detector. The latter neads it to create the high frequency signal to the RC car.

6.

broknowrchlatr
May 2nd, 2007 at 8:35 am

One more thing. Since things that use 9 volt batteries usually require very low amperage, they last a long time. I buy the cheapest I can get. You can get a four pack at one of our local dollar stores

7.

EC
May 3rd, 2007 at 10:19 pm

They also make smoke detectors that use a 10-year lithium battery–and the battery is included! Last time we got a smoke detector I bought this kind. I figured it was worth a few dollars more initially, since we’d save on having to buy new 9-volts all the time.

8.

Midnight Raider
May 4th, 2007 at 1:46 pm

Seems to me someone needs to invent another common device or two that uses 9v batteries… thus we will have some place to use the leftover juice in our smoke detector batteries after we change them out.

Perhaps a 9v TV remote control….

9.

Nick
May 6th, 2007 at 4:50 pm

…or a battery-operated battery charger. Drain from the poor to give to the rich-argeable.

10.

J at Home Finance Freedom
June 1st, 2007 at 4:30 pm

There’s no reason to cry “conspiracy” just because my owner’s manual says to buy a 9-volt 2-pack every time someone says, “Hi, Bob,” put one battery in my alarm, and throw the other one away.

11.

deanking
June 8th, 2007 at 11:34 am

There is some national code that says a smoke detector must be able to run for a year on 1 battery. Therefore the instructions you saw to replace them twice a year does indeed point to a conspiracy. Either that or a CMA to keep from getting sued. Often they are the same thing. Also, that is why the OneLink is being recalled: it did not last a year on a set of AAs. Looks like someone should have fallen in line with the conspiracy.

12.

bec
June 22nd, 2007 at 2:36 pm

After phantom alarms that only went off in the middle of the night, I checked the First Alert web-site and found out that only Energizer 9 volt batteries should be used. We decided to change the batteries every 6 months but before we could, they went off again the other night. My sister in Oregon said there is a law there that 10 year batteries can only be used. 10 year??? We were never told there was such a thing so I went online and found them! Now we look forward to many nights of uninterrupted sleep…

13.

guit dude
July 20th, 2007 at 1:33 pm

The electric guitar industry is probably doing its share at keeping up the 9v battery demand. Guitar tuners, effect pedals, etc. All on 9v batteries. The guy who invented fire alarms was probably just in a heavy metal band and had tons of 9v batteries laying around…..

14.

Have A Life
August 6th, 2007 at 10:38 am

U need to get a life, man. Why fuss over pennies when you’re throwing hundreds of $ out the window on a car payment, instead of buying a good used car?

15.

me
October 21st, 2007 at 8:53 pm

I agree that the guitar industry might be involved. guitar that use active pickups use 9 volts too, and nothing else. except you need the best quality 9 volts for them to sound good.

16.

Evilempire
January 6th, 2008 at 2:38 pm

I cannot believe you said that the most trusted and accurate source of knowledge on the internet: FoxNews.com. They never report the facts, just made up propaganda to appease there political agenda and call every one who disagrees a liberal. Rupert Murdoch is the antichrist. Wikopedia him.

17.

eric
February 11th, 2008 at 3:34 pm

actually inside of a 9-v battery, are 6 1.5v batteries called AAAA batteries (quadruple A), they will fit in electronics that call for AAA batteries, but they are smaller in diameter than regular AAA, in fact, you can just peel the outer casing off of a 9-v battery, and you will see them, and can actually use them! as for the conspiracy, i do not think there is one, i think that the 9-v is there so that you do not have to replace as often, and also it sustains a voltage longer, in turn making it safer to use so that you do not have to change it out as often. and codes also require that a single smoke detector can run for at least a year on one battery, so 9-v batteries are a little more reliable than any other battery. this is the most logical reason.

18.

eric
February 11th, 2008 at 3:49 pm

by the way, when the manual calls to change the batteries every 6 months, that is only a safety precaution, because it has been determined that an average household has a smoke detector that goes off when you are cooking something, and those “false alarms” drain the battery a little, so in order to keep a good 12% factor of safety, they have to tell you to change your batteries every 6 months.

for the guitars, you need a low amp high volt (9-v) supply in order to obtain very precise readings, high amp readings will fluctuate the meters too much and in turn they will become inaccurate. But why not put in something in the circuit that lowers the amps? well then you would be going through AA batteries like crazy! you would have to replace them after like the fifth time you used them. that is why you use the 9-v,

think what you want about your conspiracy, but do not point fingers unless you know all the facts

19.

Mike O'Risal
February 18th, 2008 at 6:26 pm

Of course there’s a conspiracy! Otherwise, my wireless mouse and keyboard would both take the same size batteries. But they don’t. The mouse takes AA, the keyboard AAA. I bought them in the same box. Clear sign of conspiracy!

20.

eric
March 6th, 2008 at 12:23 am

do you even read what you write, you sound insane, your mouse has a different size battery than your keyboard because it requires more amps than your keyboard because your mouse has a tracking device (ball, or laser) that has to constantly be on when you use it, so therefore you need more amps to run your mouse, that is why you use AA in your mouse, and your keyboard uses AAA because it does not have any tracking devises, it just consists of buttons. just because AA and AAA batteries are the same Voltages does not mean that they output the same Amperage. and this might shoot your conspiracy down, but my logitech wireless mouse and keyboard both use AA batteries, so where does that fall in your conspiracy?

21.

electric freak
March 10th, 2008 at 4:41 pm

its tru there are aaaa batteries!!!!!!!!!!!!

22.

band_nerd
May 26th, 2008 at 2:24 am

Say, do you guys realize that almost every musician that plays an electric guitar or bass guitar and has any sort of effects pedal OR has active electronics on the instrument itself, are all using 9 Volts?

I would imagine that aside form a few toys and random electronics, that guitar pedals, remote controls and fire alarms are what keep the 9 volt around.

They do make rechargable 9 Volts. However, most chain stores like walgreens, CVS or Wal-mart are not gonna carry them since there isnt really a big application for them form a normal consumer stand point.

Me personally. I have active electronics in my bass and 2 pedals. Thats 3 9 volts. My guitarist has 2 pedals. My other guitarist has a pedal too. We change them before every live show, about once a month. Thats 6 9 volts a month between us.

I’m sure we aren’t the only band that does this. ;)

23.

chugg
May 26th, 2008 at 8:43 am

Psssst! Hey guys alkalines will take a couple of recharges with a little less life in em!Shhh

24.

Ray Jensen
August 2nd, 2008 at 2:49 pm

The music company I work for, power their electromagnetic products by super strong neodymium magnets. Result: high output and no need for preamps and such. Goodbye batteries

25.

Online film izle
August 11th, 2008 at 2:21 am

Psssst! Hey guys alkalines will take a couple of recharges with a little less life in em!Shhh

26.

Tercüme
September 17th, 2008 at 10:20 am

My physics is rusty, but I recall voltage being additive. I think you should be able to hook 6 AA batteries in series to a standard fire detector..

27.

Fingerling
September 30th, 2008 at 6:04 pm

Smoke detector batteries are changed twice a year – how expensive can that really be?

28.

G
November 22nd, 2008 at 11:00 am

If you really want to be correct you can’t call individual A; AA; AAA; AAAA; C; D cells “batteries” because they are not.
They are “Cells” a battery contains more then one cell hence the name “battery”. 9V PP3s are batteries.

29.

GasRCCars Guy
December 12th, 2008 at 8:25 pm

I’m just curious as to why there has been so little advancement in battery power. It would definitely help in transitioning from fossil fuel driven power.

30.

Martin
January 5th, 2009 at 12:46 am

This post is hilarious! Great detective work. Oh, and I agree with guit dude, the guitar wielding metal heads are probably also involved.

31.

Marc
April 26th, 2009 at 8:34 am

Good explanation. I never thought that rechargeable battery can be discharged so fast. The conversations that you had is pretty interesting. Great job to discover what’s behind these smoke detector.

32.

gil
April 30th, 2009 at 11:53 pm

guitar players recomend changing 9v batteries before every performance. and most have at least 3 or 4 pedals and sometimes more. thats alot of batteries!!$
some pedals sound good with any nine volt battery, and some sound better with ‘carbon zink’ 9v batteries which are usually cheaper- fuzz pedals like carbon zink …
we use alot of batteries man.

33.

Detector laser
May 5th, 2009 at 8:08 am

it is very informative blog.I decided the best way to find out was to call the fine folks at the Energizer Customer Support Center.thank u for sharing.

34.

Pinnacle Security
May 6th, 2009 at 5:48 am

I don’t think you’re chances are good but I’m not a lawyer. If your contract said you needed to inform the company, you should have. Since you removed the equipment I have to assume you owned it. You do have a counter argument in that the company didn’t provide due diligence in noticing that the system was no longer working. Not good for an alarm monitoring company. You could argue that this shortcoming meant they weren’t doing their job and didn’t uphold their end of the contract. I don’t know how much they say you owe. It might be cheaper to pay them off and learn one of those “hard knock” lessons rather than hire a lawyer. They’re probably banking on this, but it’s a fact that you may come out ahead unless you can act as your own attorney and it doesn’t cost you to take the necessary time off from work.

35.

Home Security Systems
May 17th, 2009 at 12:36 pm

NICE battery worthy to use it so everywhere prefer that. Why do smoke detectors run on 9-volt batteries? Why not AAs or AAAs? Why indeed, especially given that so few devices other than smoke detectors use 9-volts? And 9-volts aren’t cheap either–the typical 9-volt battery costs at least twice as much as a AA or AAA battery.

36.

Alarm Monitoring
May 17th, 2009 at 10:47 pm

I cannot believe you said that the most trusted and accurate source of knowledge on the internet: FoxNews.com. They never report the facts, just made up propaganda to appease there political agenda and call every one who disagrees a liberal. Rupert Murdoch is the antichrist. I don’t think you’re chances are good but I’m not a lawyer. If your contract said you needed to inform the company, you should have. Since you removed the equipment I have to assume you owned it. You do have a counter argument in that the company didn’t provide due diligence in noticing that the system was no longer working. Not good for an alarm monitoring company. You could argue that this shortcoming meant they weren’t doing their job and didn’t uphold their end of the contract. I don’t know how much they say you owe. It might be cheaper to pay them off and learn one of those “hard knock” lessons rather than hire a lawyer. They’re probably banking on this, but it’s a fact that you may come out ahead unless you can act as your own attorney and it doesn’t cost you to take the necessary time off from work.

37.

guitarguy
May 20th, 2009 at 12:09 pm

i have over 30 guitar pedals now & started using a couple of rechargable 9v batteries – i’m also going to try using a 12v gel cell
at home to power 6 or 7 pedals at a time – instead of using a
wallwart – next step –>>> solar powered battery charger!

38.

Sensible
May 23rd, 2009 at 2:49 am

Honestly, a two pack of 9v will run you, what?… $10USD? Is $10 a year REALLY that big of a conspiracy. If they wanted you to change them bi-weekly, yeah… conspiracy… but $10 a year isn’t earning anyone any kind of substantial money, considering the average american household has only 1-2 smoke detectors.

I’m a Star Wars costumer, and many of us use 9v batteries to power electric fans and microphones inside our helmets (aka, storm trooper helmets, vader, etc etc).

In the end, for some applications, its just simpler and easier to have one battery powering the device than a collection of cells. Think about this: many of these smoke detectors would have to be designed larger to accomodate the extra space taken up by 6+ AA batteries. That adds several square inches to the inside of a product, and they have to spend more on materials for the extra space, extra on packaging cause the product is larger, etc etc etc.

In my helmet, I run two fans and a microphone off 9v batteries. If I had to have 6+ AA batteries to power each of those, I’d never be able to fit it in my helmet.

On these guitar pickups and pedals, the same principle applies. THere is just not a need to have loads of space and extra batteries to power the thing. Just use a single multi-celled unit to power it and take up only a quarter of the room.

Think about the number of devices requiring only 2 AA batteries to run. That is virtually every remote control in the country. Most flash lights run on 4 AA, or two D-Cells. They only use 2-4 of these cells per device. It’s economical for both the company and the consumer to have it just run on 2 cells. The high demand (both because of the number of units and high burnout rate on these cells) causes them to be made in higher quantities.

I love the 9v battery. It is a convenient way to store a lot of power in a small place and get the job done.

There is no conspiracy. They’re just doing what is economical and trying to cover their ass if your house burns down… or god forbid, an apartment complex. They’re making sure that you have a reliable battery, and then they tell you to change it every six months so you can’t turn around and sue them for “not letting you know there was a fire.”

How many times have you seen a conspiracy be real? I mean, really real. No just “I believe it’s real”, but actual, it was on the news, written down in history as “this was a conspiracy that was successful,” kind of thing. Sure, some secrete stuff like CIA, etc, but Conspiracies are for the movies. Most of the time, it’s just people not understanding the facts and going off about it.

39.

business alarm system
June 1st, 2009 at 6:15 am

Actually, our smoke and CO detector runs on 3 AA batteries. It’s made by Kidde. It has a nice lady saying “Fire Fire Fire. Warning Carbon Monoxide”. She sounds alot like the robot from Lost in Space. Simply hook up 8 AA batteries or 20 AAA batteries in a series to a standard fire detector. This invention should be able to run for at least 4 months straight! The biggest advantage to this is that every year you will have a ton of extra half dead AA or AAA batteries to mix and match to put into your wireless mouse, alarm clocks, diabetic monitor, etc. I work for a major manufacturer; reason why 9v is that so few other appliances use, so there is less chance of battery being borrowed for use in something else (less important!).
Rechargeables do indeed exist BUT are not suitable due to their dischrage pattern.Rusty is right, voltage is additive (when run in series). It actually does make sense that smoke detectors are run on 9 volts. AAs and AAAs are 1.5 volts. So you need 6 of them to make 9 volts. Is 6 of those really cheaper than 1 – 9 volt? One more thing. Since things that use 9 volt batteries usually require very low amperage, they last a long time. I buy the cheapest I can get. You can get a four pack at one of our local dollar stores

40.

Deep6
June 2nd, 2009 at 11:21 am

If they discontinue the 9-volt battery, wht will we stick our tongues on!!??

41.

TorontoJoe
June 26th, 2009 at 9:09 am

OK – As much as I love a good conspiracy, I work in broadcasting and we have a lot of devices that use 9V batteries. These include portable mixers and all those wireless mic’s you see on reporters and hosts. The split in all these devices is about 50/50. What I was trying to figure out is why a manufacturer, making the same professional, high-end product, woud choose to use one over the other.

For instance. I have a bunch of transmitters from Sennheiser that I bought 2 years ago that use 9v. I just bought a few of this years mode and they use 2 AA’s instead. Both are great and both seem to last about as long. (perhaps a little longer with the 9v).

I just cant figure out why they would go witho one over another.

Any thoughts?

42.

moleman
June 29th, 2009 at 11:08 am

I am so glad to find out I am not the only one with a 9 volt tongue. A shocking question has now been answered for me, I can now get a full nights sleep. Thanks so much

43.

eddy1320
July 2nd, 2009 at 3:51 am

efects peddles wor off 9 volts as well

44.

travc
July 13th, 2009 at 6:24 am

9V batteries are convenient for driving 5V TTL devices… which aren’t really used in up-to-date designs, but are in lots of legacy stuff. They are used in guitars and such because some people got used to hackish stuff from decades past and anything else “doesn’t sound right”.

Anyways, modern electronics typically use lower voltages (3.8 and 2.6 are common), but more importantly, they often have an actual voltage regulator.

If you are sick of your fire alarm battery dying, get a 12V to 9V DC-DC converter and hook up a car battery (or more realistically, one of those motorcycle gel batteries). I’ve use one of these for lots of stuff. 12V (14V actually) to anything lower you want.

45.

Epiphone
July 13th, 2009 at 4:45 pm

I use a 9 volt batter to power by electric guitar parts easily. Once I was able to connect my ibanez pickups to my 9 volt battery, and another 9 volt mounted on my jack plate and that creates an awesome sound, when I perform ppl wonder how the hell I did that. Anyways nice article thx for the post

46.

estetik
July 20th, 2009 at 7:39 am

thank you very nice

47.

motorcycle chargers
July 22nd, 2009 at 12:07 pm

A+ work done. I really appreciate this blog. thanks a lots.

48.

gary
November 3rd, 2009 at 9:02 pm

Nice blog. However, simply crack open any 9 volt battery and you will see it contains six 1.5 volt AAA batteries !! Yep , that’s what I said; six triple A batteries is how they actually MAKE a 9 v rectangular conspiracy.

Sorry to blow your theory…but you have bee USING AAA batteries all along ! Don’t you fell stupid now?

49.

Scott
December 22nd, 2009 at 1:03 am

Gary,
I believe that a 9 volt holds 6 AAAA batteries. Those are quad A’s not triple A’s. There are videos out there that show the AAAA batteries coming out of the 9 volt once pried open. There are other 9 volt batteries that have button cells side by side (pez shaped case) and 7 of those exist in a 9 volt as well. I just found that out today ripping open an e2 Energizer 9 volt hoping to find 6 AAAA’s. Oh well, that was a $13 lesson. I am sure I will find a use for the others in some other application.
And as far as conspiracies go, there are many out there. It is so hard to prove they exist. I would say though, that there is a sand boxing people to have to use 9 volts for only certain things, which makes it highway robbery rather than conspiracy. What would the battery manufacturers or pedal manufacturers be conspiring to anyway? Take over the world? Not unless they showed that our president Obama is really a robot being powered by C or D batteries. Or UFO’s are powered by AA or AAA batteries. Crazy!!!

50.

Gene
January 6th, 2010 at 7:56 pm

Back on posting #4, Gel, who says he/she works for a manufacturer, explained that smoke alarms are designed to emit beeps when the battery voltage level drops to 7.5 volts, as a safety feature.

I’m coming at this from a different angle: it seems like a waste financially and environmentally to toss out so many 9 v batteries that still have life in them. We have about 6 smoke detectors around the property, so it adds up.

Does anyone know of an organization / system / market / whatever whereby still-useful 9 volt batteries that are no longer good for smoke alarms can be gotten into the hands of someone who could use them– for guitars, star wars helmets, toys or tools of any sort?

thanks for the interesting and entertaining blog.

51.

dont want to tell
February 6th, 2010 at 3:54 am

if you split open a good quality 9v battery you will find 6 aaaa batteries.

52.

dont want to tell
February 6th, 2010 at 4:04 am

once you have the 6 aaaa batteries out of the 9v you can put them in any thing that uses aa or aaa. thus giving you a use for these half dead batteries. you just need to use a piece of the metal from the 9v connector lead as a spacer. to make the spacer you just get a small piece (1/2 inch or so) of the metal from inside of battery (it runs the length of the battey and is about 1/4 inch wide) and make a v out of it. once you have your spacer and the batteries just put the battery in the place of the aa or aaa and use the v as a power connecting wedge.

your welcome

ps Duracell or the one with the rabbit is the best i think

53.

stephen
March 14th, 2010 at 3:42 pm

one 9v battery is cheaper and and alot more simple to replace than 6 AA batteries

54.

David
April 6th, 2010 at 8:49 am

The new recomended smoke alarm runs on regular ac mains supply.but still uses a 9 volt battery as a backup.

55.

laptops batteries
April 21st, 2010 at 7:57 pm

now many many states are not allow smoke now

56.

J-Wizard
April 21st, 2010 at 9:23 pm

Next time try NIST.gov . pretty sure that standard mentioned about drop-off would have been with the standards they manage for batteries

57.

chicago airport limo
April 22nd, 2010 at 11:02 am

Maybe the one we should blame here are the designers of the deice because if they only want to make power source of the device much cheaper they can do it.

58.

laptops AC adapter
April 30th, 2010 at 9:28 pm

I have a bunch of transmitters from Sennheiser that I bought 2 years ago that use 9v. I just bought a few of this years mode and they use 2 AA’s instead

59.

laptops battery
April 30th, 2010 at 9:29 pm

voltage is additive (when run in series). It actually does make sense that smoke detectors are run on 9 volts. AAs and AAAs are 1.5 volts.

60.

LJ
May 13th, 2010 at 2:32 pm

QUESTION…………Can ANY 9 volt battery be used in a smoke detector, or is it required to install the model number as indicated on the detector? I know it says that by using different model numbers “may” result in faulty operation of the detector. This has never happened in any of mine, but my question is being relayed through me by another person.

61.

Saving Money
May 14th, 2010 at 4:12 pm

We have a few Kidde brand smoke/carbon monoxide detectors and they use 3 AA batteries each. they are out there!

62.

estetik
May 16th, 2010 at 4:38 pm

The new recomended smoke alarm runs on regular ac mains supply.but still uses a 9 volt battery as a backup.

63.

battery-stores
May 16th, 2010 at 9:19 pm

Thanks for sharing the post.

64.

Registry Repair Reviews
May 26th, 2010 at 9:26 pm

It is all about the money. Thats what it comes down to. This was a very interesting when I first saw it I didnt think it would be but there is something to it. I never noticed or even thought about the 9 Volt battery situation. Great Article!

65.

Free Advertising Site
May 26th, 2010 at 9:34 pm

rechargable batteries cant be used in smoke detectors sounds like a conspiracy there. Same thing with the light bulb they have ones that will last forever but they want them to go bad so people will keep buying them. Conspiracy are not from the battery companys perspective can see why they do it.

66.

Dave Melia
June 17th, 2010 at 6:01 am

There is another way of getting round this, if you can you can run the smoke detector off the mains with the use of a 9Vdc power supply. We have a few which you can find at http://www.simplypowersupply.com, these can be found in the adaptors section.

This way you will have a one off cost and with a bit of simple wiring you can run your alarm forever with this.

67.

Valve Cover Gasket Set
June 19th, 2010 at 2:09 am

I believe gas tanks in cars are vacuum sealed. Ethanol might be a consideration, although I don’t believe the evaporation is a consideration with newer cars.

68.

whey protein reviews
June 22nd, 2010 at 4:07 am

wikipedia always saves the day. Really funny about the recall conversation on the recording.

69.

Beep Test
June 23rd, 2010 at 12:16 pm

An interesting point that i wouldn’t have otherwise thought about. I dont think you can buy an AA or AAA detector over here in the UK, I will investigate further…

70.

Articles
July 4th, 2010 at 11:23 am

I agree that the guitar industry might be involved. guitar that use active pickups use 9 volts too, and nothing else. except you need the best quality 9 volts for them to sound good.

71.

Katie
July 30th, 2010 at 6:00 pm

“Honestly, a two pack of 9v will run you, what?… $10USD? Is $10 a year REALLY that big of a conspiracy. If they wanted you to change them bi-weekly, yeah… conspiracy… but $10 a year isn’t earning anyone any kind of substantial money, considering the average american household has only 1-2 smoke detectors.”

It’s required by law, at least here in the US, that every new house has a smoke detector in every single room. My 4 bedroom, 2 bath single story house has 8 of them.

72.

chanel outlet
August 31st, 2010 at 7:54 pm

This was a very interesting when I first saw it I didnt think it would be but there is something to it