--- product_id: 671916709 title: "Optical Smoke Alarm - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White" brand: "fireangel" price: "€ 42.16" currency: EUR in_stock: true reviews_count: 5 category: "Fireangel" url: https://www.desertcart.hr/products/671916709-optical-smoke-alarm-fa6620-10-year-battery-smoke-alarms-home store_origin: HR region: Croatia --- # Test/Silence button for nuisance alarms 10-year sealed battery lifespan Optical smoke sensing chamber Optical Smoke Alarm - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White **Brand:** fireangel **Price:** € 42.16 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of fire risks with 10 years of silent, smart protection 👁️ ## Quick Answers - **What is this?** Optical Smoke Alarm - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White by fireangel - **How much does it cost?** € 42.16 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/671916709-optical-smoke-alarm-fa6620-10-year-battery-smoke-alarms-home) ## Best For - fireangel enthusiasts ## Why This Product - Trusted fireangel brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Silence Mode:** Temporarily mute nuisance alarms for 8 minutes with the test/silence button—sleep easy without compromising safety. - • **Decade-Long Peace of Mind:** Built-in 10-year sealed lithium battery means zero hassle and uninterrupted protection for your home’s lifetime. - • **Precision Smoke Detection:** Advanced optical sensor 'sees' slow-burning fires early, minimizing false alarms from cooking fumes and everyday steam. - • **Certified Safety Assurance:** CE and UKCA marked, BS EN 14604:2005+AC:2008 certified, backed by a 5-year warranty for trusted home protection. - • **Effortless Installation & Replacement:** Removable base plate with twist-and-lock design fits existing FireAngel ST-622/ST-620 mounts for a seamless upgrade. ## Overview The FireAngel FA6620 Optical Smoke Alarm features a cutting-edge optical sensor that detects slow-burning fires with thick smoke early, while reducing false alarms from cooking fumes. Equipped with a 10-year sealed lithium battery, it guarantees a decade of maintenance-free safety. Its easy twist-and-lock installation fits existing FireAngel mounts, and the test/silence button offers smart nuisance alarm control. Certified to top UK and EU safety standards and backed by a 5-year warranty, it’s the reliable upgrade for modern homes. ## Description Designed as a replacement for the Fire Angel ST-622 / ST-620 smoke alarms, the FireAngel FA6620 Optical Smoke Alarm is fitted with a 10-year lifetime sealed battery and equipped with an optical sensing chamber, providing a fast response to slow-burning fires. ENHANCED SENSING The optical smoke sensing chamber works by 'seeing' smoke as it enters the alarm—making it perfect for slow-burning fires with thick white smoke and less prone to false alerts from cooking fumes. It can still be subject to nuisance false alarms from steam and should not be placed near bathrooms or kitchens. SLEEP EASY If a low battery alert occurs at night, you can silence the smoke detector for 8 hours by pressing the test button. The alarm will be muted, but the red LED will continue to flash. The alarm will still detect smoke during Sleep Easy mode. Replace within 30 days. TEST/SILENCE To test your device, press the large test button for 5 seconds. A loud, high-pitched sound will verify the alarm is functioning correctly. During a known false alarm, press the test button for 5 seconds to temporarily silence the alarm for 8 minutes. Review: Not working at all, 10 years battery...I had to get expired one - This one I received today. It's working correctly. This is what I needed. Happy now Review: Great if it actually works! - Thankfully it has never been actually tested with a fire, so cannot answer. ## Features - SMOKE DETECTORS FOR HOME: The optical smoke alarm makes protecting your home simple. Its optical sensing chamber 'sees' smoke as it enters the alarm, providing a fast response to slow burning fires with thick white smoke. - FEWER NUISANCE ALARMS: The advanced optical sensor ensures the FireAngel smoke alarm is less prone to false alerts from cooking fumes. Avoid placing near bathrooms or kitchens. - 10-YEAR BATTERY: Each smoke alarm is fitted with a 10-year sealed battery, offering protection for the lifetime of the device without needing to change the batteries. - EASY INSTALLATION: Fitted with a removable base plate, secure it to the ceiling using the screws provided. Push and twist to secure the device. The base plate is identical to the ST622, making replacements quick and easy. - SAFETY ASSURED: The FA6620 smoke alarm holds CE and UKCA marks and is certified to BS EN 14604:2005+AC:2008. Suitable for domestic premises, including leisure accommodation vehicles, it comes with a 5-year warranty. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09V5C7GHF | | Alarm | Smoke Alarm | | Best Sellers Rank | #35,887 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #50 in Smoke Alarms | | Brand | Fireangel | | Built-In Media | 1 x Baseplate, 1 x Instruction Manual, 1 x Optical Smoke Alarm complete with Sealed Lithium Battery | | Color | White | | Colour | White | | Customer Reviews | 4.4 out of 5 stars 7,656 Reviews | | EU Spare Part Availability Duration | 10 Years | | Enclosure Material | Plastic | | Item Dimensions D x W x H | 3.2D x 11.8W x 11.8H centimeters | | Item Type Name | Smoke Alarm | | Item Weight | 138 Grams | | Item weight | 138 Grams | | Manufacturer | FireAngel | | Mfr Part Number | FA6620-R | | Model Number | FA6620-R | | Number of Items | 1 | | Operating Humidity | up to 90% | | Power Source | Battery Powered | | Power source | Battery Powered | | Product Style | New Gen Single | | Product dimensions | 3.2D x 11.8W x 11.8H centimeters | | Sensor Type | Photoelectric | | Style | New Gen Single | | UPC | 816317006242 | | Unit Count | 1 Count | | Upper Temperature Rating | 38 Degrees Celsius | ## Product Details - **Brand:** Fireangel - **Colour:** White - **Power source:** Battery Powered - **Product dimensions:** 3.2D x 11.8W x 11.8H centimeters - **Style:** New Gen Single ## Images ![Optical Smoke Alarm - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White - Image 1](https://m.media-amazon.com/images/I/51WydtnJICL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Not working at all, 10 years battery...I had to get expired one *by G***Y on 17 April 2026* This one I received today. It's working correctly. This is what I needed. Happy now ### ⭐⭐⭐⭐⭐ Great if it actually works! *by M***N on 3 May 2026* Thankfully it has never been actually tested with a fire, so cannot answer. ### ⭐⭐⭐⭐⭐ Compact *by S***Y on 6 June 2026* Compact smoke alarms with built in batteries. Easy to install and have a light indicator. Worth paying for. ## Frequently Bought Together - FireAngel Optical Smoke Alarm - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White - FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button - FireAngel Heat Alarm with 10 Year Sealed For Life Battery, FA6720-R (HT-630 replacement, new gen), White --- ## 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.hr/products/671916709-optical-smoke-alarm-fa6620-10-year-battery-smoke-alarms-home](https://www.desertcart.hr/products/671916709-optical-smoke-alarm-fa6620-10-year-battery-smoke-alarms-home) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-10*