--- product_id: 1774296 title: "Hardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC" brand: "kidde" price: "£47.00" currency: GBP in_stock: true reviews_count: 9 url: https://www.desertcart.co.uk/products/1774296-hardwire-smoke-detector-with-9v-battery-backup-and-front-load store_origin: GB region: United Kingdom --- # 120V hardwired power Front-load battery door 9V battery backup Hardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC **Brand:** kidde **Price:** £47.00 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of fire risks with Kidde’s smart, hassle-free smoke detector! 🔋 ## Quick Answers - **What is this?** Hardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC by kidde - **How much does it cost?** £47.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/1774296-hardwire-smoke-detector-with-9v-battery-backup-and-front-load) ## Best For - kidde enthusiasts ## Why This Product - Trusted kidde brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Uninterrupted Safety:** 9V battery backup keeps your home safe even during power outages—because peace of mind never sleeps. - • **360° Flexible Mounting:** Install from any angle with the versatile mounting bracket—perfect fit for every space. - • **Effortless Battery Swap:** Front-load battery door means no dismounting—replace batteries in seconds and stay protected. - • **Quick & Clean Installation:** Pre-stripped wiring harness with easy-off caps makes setup a breeze—get protected faster. - • **Advanced Ionization Sensing:** Detects invisible flaming fire particles early—stay ahead of danger with cutting-edge tech. ## Overview The Kidde I4618AC is a UL-listed, hardwired ionization smoke detector powered by 120V AC with a 9V battery backup for continuous protection. Featuring a front-load battery door for easy replacement without removal, a 360° mounting bracket for versatile installation, and a pre-stripped wiring harness for quick setup, it offers reliable early detection of flaming fires. Backed by a 5-year limited warranty, this model is designed for professional-grade safety and convenience in any home or property. ## Description The Kidde i4618 is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. The front-loading battery door allows user to change the battery without removing the alarm from the mounting bracket making battery replacement easy and convenient. This smoke alarm is available in a 6-piece cut case with tray for easy display as well as a 6-piece bulk pack for contractors and property owners. This unit is a UL Listed product with a 5-year limited warranty. Kidde strongly recommends that both ionization and photoelectric smoke alarms be installed to help insure maximum detection of the various types of fire that can occur within the home. Review: Quality and reliability. - A bit pricy. But prompt delivery and easy installations. Two thumbs up! Review: 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. ## Features - Front Load Battery Compartment for easy battery replacement - Hush alarm control button silences nuisance alarms - 9-Volt battery backup provides protection during power outages - Pre-stripped wiring harness with easy-off caps ensures quick installation - 360° mounting bracket allows mounting from any angle ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001XQ5VHW | | Alarm | Audible | | Batteries | 1 Unknown batteries required. (included) | | Batteries Included? | Yes | | Batteries Required? | Yes | | Battery Cell Type | Zinc Carbon | | Best Sellers Rank | #101,122 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #114 in Smoke Detectors & Fire Alarms | | Brand | Kidde | | Color | White | | Compatible Devices | Up to 24 Kidde devices | | Customer Reviews | 4.6 4.6 out of 5 stars (2,293) | | Date First Available | October 2, 2001 | | Global Trade Identification Number | 00047871075812 | | Included Components | i4618 smoke alarm, mounting bracket, user manual, wiring harness | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 9.6 ounces | | Item model number | I4618AC | | Manufacturer | Kidde Safety | | Number of Items | 1 | | Part Number | 21007581 | | Power Source | AC/DC | | Product Dimensions | 2"D x 6"W x 6"H | | Sensor Type | Ionization | | Size | 5.6 in diameter x 1.8 in depth | | Style | Hardwired Smoke Detector | | UPC | 047871075812 696505457397 | | Upper Temperature Rating | 100 Degrees Fahrenheit | | Voltage | 120 Volts | | Warranty Description | 5-year limited | ## Product Details - **Alarm:** Audible - **Brand:** Kidde - **Color:** White - **Compatible Devices:** Up to 24 Kidde devices - **Item Weight:** 9.6 ounces - **Power Source:** AC/DC - **Product Dimensions:** 2"D x 6"W x 6"H - **Sensor Type:** Ionization - **Style:** Hardwired Smoke Detector - **Upper Temperature Rating:** 100 Degrees Fahrenheit ## Images ![Hardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC - Image 1](https://m.media-amazon.com/images/I/61NhWaKpE8L.jpg) ## Questions & Answers **Q: false alarm** A: 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. **Q: Does it have a visible low battery indicator in addition to the chirping? The instruction manual does not indicate this feature.** A: 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: Does it come with battery** A: Yes, it comes with battery **Q: If chirping continues after replacing battery and resetting, what do I do?** A: 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality and reliability. *by R***R on January 12, 2026* A bit pricy. But prompt delivery and easy installations. Two thumbs up! ### ⭐⭐⭐⭐⭐ Who knew smoke detectors had an expiration date? *by C***. on March 28, 2025* 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. ### ⭐⭐⭐⭐⭐ Life saving system *by G***N on March 27, 2025* 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 ## Frequently Bought Together - Kidde Hardwire Smoke Detector with 9V Battery Backup and Front Load Battery Door | Model I4618AC - Kidde i4618AC Battery Powered Hardwire Smoke Alarm, 4 Pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/1774296-hardwire-smoke-detector-with-9v-battery-backup-and-front-load](https://www.desertcart.co.uk/products/1774296-hardwire-smoke-detector-with-9v-battery-backup-and-front-load) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-25*