Same. We had these for about 5 years and they worked fine, in the interconnected system, then we started getting false alarms where all the detectors would go off and start blaring and beeping...ALWAYS IN THE MIDDLE OF THE NIGHT. They pretty much go off once or twice a night tho and we're through with these. I don't know why they only go off when you're sleeping, but we've had it.

KiddeHardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC

KiddeHardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC

Q: Does it have a visible low battery indicator in addition to the chirping? The instruction manual does not indicate this feature.

According to the manual, you have to stare at the green light, which is on solidly, and watch for a red flash, and count the seconds between. About 30 or so seconds, the battery is okay. About half of that, and it is not. Keep reading- it doesn't work the way the manual says!!!! I have only caught one low battery this way. I have never had them chirp, due to a low battery- they have consistently set off all of the alarms in the house, full volume and noise, for several seconds- VERY disconcerting, especially to the kids, and to me, in so far as they automatically assume that it is a battery issue, versus leaving the house. To be honest, so do I, after having been awoken several times in the middle of the night, due to this incredible poor design, (or flawed construction- the instructions don't say that this is how they are supposed to work.) In one instance, I had checked for the red flashing light timing, for indication of a low battery, about 4 days before the stupid thing went off again. Maybe it is just me, but I have neither the time, nor patience, to stare at each of these things every day or two, for a minute apiece, in hoping to catch a low battery before they go off. If I had the option (I don't own the house,) I would gladly buy something else, and would have replaced them all, at my own expense, long ago.

Q: If chirping continues after replacing battery and resetting, what do I do?

If the unit chirps at seemingly random times or at random intervals after replacing the battery, check for the following conditions:1) The battery may be loose, or improperly installed.The smoke alarm cover may be dirty.3) Reset the alarm.4) An electrical condition may be causing the power to the unit to be interrupted. If the AC power to the unit is interrupted, the unit will chirp when the power is restored. This could be caused by power surges.5) Replace the alarm.Full instructionshttp://www.firexsafety.com/homedir/en/productsservices/firex/onlineservices/faq/frequently+asked+questions.htm

Product ID: 1774296

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Details

Brand
Kidde
Style
Hardwired
Power Source
AC/DC
Color
White
Product Dimensions
2"D x 6"W x
Item Weight
0.6 Pounds

⚡Hardwired AC/DC power for uninterrupted protection

🔄360° mounting bracket for versatile installation

🔋9V battery backup for power outage security

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Description

🚨 Stay safe, stay smart—protection that never sleeps!

MOUNT IT YOUR WAY - 360° mounting bracket adapts to any ceiling or wall angle for seamless integration.
POWER OUTAGE PROOF - 9V battery backup ensures your home stays protected even when the lights go out.
QUICK CLEAN INSTALL - Pre-stripped wiring harness with easy-off caps means setup is fast and frustration-free.
EFFORTLESS BATTERY SWAP - Front-load battery door makes replacements a breeze—no ladder gymnastics needed.
SILENCE NUISANCE ALARMS - Hush button lets you pause false alarms instantly, keeping peace of mind intact.

The Kidde Hardwire Smoke Detector Model I4618AC combines reliable ionization sensing with a 9V battery backup and front-load battery door for easy maintenance. Designed for quick installation with a pre-stripped wiring harness and versatile 360° mounting bracket, it ensures continuous, hassle-free fire protection. Compatible with up to 24 Kidde devices, this smoke alarm offers professional-grade safety with user-friendly features and a 5-year limited warranty.

Specifications

Brand	Kidde
Style	Hardwired Smoke Detector
Power Source	AC/DC
Color	White
Product Dimensions	2"D x 6"W x 6"H
Item Weight	0.6 Pounds
Alarm	Audible
Compatible Devices	Up to 24 Kidde devices
Upper Temperature Rating	100 Degrees Fahrenheit
Sensor Type	Ionization
Global Trade Identification Number	00047871075812
Number of Items	1
Manufacturer	Kidde Safety
UPC	047871075812 696505457397
Part Number	21007581
Item Weight	9.6 ounces
Item model number	I4618AC
Batteries	1 9V batteries required. (included)
Is Discontinued By Manufacturer	No
Size	5.6 in diameter x 1.8 in depth
Voltage	120 Volts
Item Package Quantity	1
Included Components	user manual, mounting bracket, wiring harness, i4618 smoke alarm
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Zinc Carbon
Warranty Description	5-year limited

Have a Question? See What Others Asked

false alarm

Does it have a visible low battery indicator in addition to the chirping? The instruction manual does not indicate this feature.

Does it come with battery

If chirping continues after replacing battery and resetting, what do I do?

Reviews

C**.

Who knew smoke detectors had an expiration date?

As I changed the batteries in my detectors last Daylight Savings, I noticed a sticker on my old 1275 models that stated a 10 year life span from the date of manufacture. DOM showed 2002 and an expiration date of 2012. Ooops. Obviously you can't get this dinosaur anymore so I looked for compatible alarms that had the same plug pattern (triangular) as my hardwiring. The Kidde website was very helpful finding a replacement. I only had to change the mounting frame. Quick and easy. I love that the battery backup is on the facing surface. Great product and the perfect replacement.No more dismounting and unplugging. Stay safe people. Check your expiration dates, change your batteries, clean out the sensors with canned air and test them once a month.

28.03.2025

J**F

Direct replacement, easy to install.

Exactly as advertised. Was an exact replacement for my existing smoke alarms. Easy plug and play. I didn’t use the baseplate or wiring harness because I purchased this newer version of the older ones I replaced, and just had to plug them in and twist them in place.

11.05.2025

G**N

Life saving system

Just replaced all five alarms in the house. They arrived ahead of scheduled time. The product packaging was perfect with no transit damage. Installation was simple (hardwired into my home) each tested perfectly. This type of alarm has the easiest battery replacement of any I looked at. I highly recommend this product

27.03.2025

M**E

Very good product identical to another place

I installed it it looks identical to the one I replaced

11.05.2025

M**K

Great price

Nice price and works with my others

30.03.2025

J**.

Easy to install

It works. It was easy to install as a replacement product.

5.04.2025

L**E

Great

Great smoke detector.

15.07.2025

B**T

If winter comes, can alarms be far behind?

It is false alarm season. Every year in late fall or early winter we ring in the season with Kidde i4618 alarms. When the weather turns and the nighttime temperatures in the house sink, we rise in the night to blaring alarms and celebrate the canonical hours which usually go something like this.Vigils. 1:30am - Alarm sounds.. We all shoot bolt upright and I begin running chaotically around the house. After trying to activate Hush mode on each unit, I finally succeed by dragging the step ladder from the garage into our bedroom where the festivities had begun five minutes earlier. I then move through the house replacing batteries on all seven units. I get out the ear plugs I keep in the nightstand and put them in easy reach. I leave the step ladder pre-positioned under our bedroom i4618. Lights out but the vigil has truly begun.Matins/Lauds 4:45am - Alarm sounds. My vigil has been rewarded. Sleepy stirrings from others. I move through the house with step ladder and vacuum all seven units. I start the coffee.Prime. 6 am. Comb the web for manuals and advice in Amazon's single-starred reviews (and this year write my own).The rest of the day usually runs something like this:Terce. 9 am. For good measure I order a couple more i4618's "just in case".Sext. 12pm. I go back into the basement to contemplate the one unit that will not stop chirping after battery replacement.None. 3pm. I stand under each unit looking up and hoping for illumination--the red blink.Vespers. 6pm. All is calm. I meditate on an appropriate name for this addition to our liturgical calendar.Compline. I become fidgety with anticipation. Soon Vigil begins again.And the reason for the holiday? Batteries? Insects? The electrical grid? Alarm placement? (All Kidde suggestions by the way.) Temperature? AI? Demonic possession? I fear we shall never know. Best to just enjoy. (BTW. Apologies to P.B. Shelley)

22.11.2014