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Battery Smoke Alarms
A battery smoke alarm is the simplest level of fire detection. At a very basic level, there are standalone units with no interlink capabilities, whereas with more advanced models including a tamper-proof battery and radio interlink technology provide a little more coverage and warning to the event of a fire in your property.
These alarms are available as optical smoke detectors (detects slow smouldering fires), suitable for hallways, bedrooms, and living rooms, or as heat alarms (detects rapid increases in temperature), designed for kitchens and garages, or where lots of dust, fumes, steam, or other contaminants may cause false alarms.
Some battery-only powered alarms have a battery compartment to replace the depleted batteries every 12 to 18 months, throughout the alarms 10-year lifespan. Others have a sealed battery, which lasts the lifespan of the alarm.
All of our battery smoke detectors and heat alarms are suitable for Grade F installations, and meet the requirements for Grade F1 or F2. Please see our guide to BS 5839-6: 2019 for more information on Grades of alarms.
10 Year Longlife Battery Optical Smoke Alarm - Kidde 10Y29
- FREE delivery
- Battery: Built-in, lasts the lifetime of your alarm - GUARANTEED
- Warranty: 10 year warranty
- Features test and hush buttons
- Low Volume Test feature
- Suitable for BS 5839-6: 2019 (Grade F1 installations)
- Kitemarked to BS EN 14604: 2005
Battery Optical Smoke Alarm - UltraFire UBS1
- Battery: 9V alkaline battery (included)
- Warranty: 10 year warranty
- Large test and hush button
- High performance optical sensor
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS EN 14604: 2005
Battery Optical Smoke Alarm - UltraFire UBS1 Twin Pack
- Battery: 9V alkaline battery (included)
- Warranty: 10 year warranty
- Large test and hush button
- High performance optical sensor
- 2 x optical smoke alarms included
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS EN 14604: 2005
Battery Smoke Alarms and Heat Alarm Home Essentials Kit - UltraFire UFUB1KIT
- FREE delivery
- Battery: Alkaline batteries (included)
- Warranty: 10 year warranty
- Large test and hush button
- 2 x optical smoke alarms and 1 x heat alarm included
- Suitable for BS 5839-6: 2019 Grade F2 installations
- CE marked
Battery Optical Smoke Alarm - Kidde 2030-DSR
The Kidde 2030-DSR optical smoke alarm is easy to use and great value, with a low-profile, unobtrusive design. Automatic low battery and end of life warnings which can be silenced for 24 hours.
- Battery: 9 Volt carbon zinc battery (included)
- Warranty: 3 years (product life up to 10 years)
- Optical smoke sensor reduces nuisance alarms
- Simple test & hush button plus LED status indicator
- CE marked and certified to EN 14604: 2005
Battery Optical Smoke Alarm - Kidde 29HD
- Battery: 9V alkaline battery (included)
- Warranty: 5 year warranty
- Features test and hush buttons
- Sleek and compact design
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS EN 14604: 2005
Kidde 2030-DSR Optical Smoke Alarm & K5CO Carbon Monoxide Detector Special Offer
- Battery powered optical smoke alarm
- Certified to BS EN 14604: 2005 and CE marked
- Battery powered carbon monoxide detector
- Kitemarked to BS EN 50291-1: 2018 and CE marked
Combination Carbon Monoxide and Smoke Alarm 10 Yr Warranty - Kidde K10SCO
- Product Life: 10 years
- Battery: 2 x AA alkaline battery powered (included)
- Warranty: 10 year warranty
- Combined optical smoke and carbon monoxide detector
- Ideal for hallways, bedrooms, and living rooms
- Voice alarm and sounder: different warning messages for smoke and CO
- Certified to BS EN 14604: 2005 (smoke alarm)
- Certified to BS EN 50291-1: 2018 (CO alarm for domestic use)
10 Year Longlife Battery Optical Smoke Alarm - UltraFire ULLS10
Powered by a 10 year sealed lithium battery and featuring an optical smoke sensor specially designed to maximise smoke detection and minimise false alarms, this alarm provides top-class standalone protection.
- Battery: 10 year sealed lithium battery
- Warranty: 10 year manufacturer's warranty
- Optical smoke sensor suitable for hallways, landings, living rooms, and bedrooms
Battery Heat Alarm - UltraFire UBH1
- FREE delivery
- Battery: AA alkaline batteries (included)
- Warranty: 10 year warranty
- Large test and hush button
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Kitemarked to BS 5446-2: 2003
10 Year Longlife Battery Heat Alarm - UltraFire ULLH10
Ideal for rooms like garages, kitchens, and lofts where dust or fumes would cause false activations of smoke alarms, the UltraFire ULLH10 features a sealed 10 year battery and 10 year manufacturer's warranty.
- Battery: 10 year sealed lithium battery
- Warranty: 10 year manufacturer's warranty
- Heat sensor suitable for kitchens and garages
Radio-Interlinked Battery Powered Optical Smoke Alarm - UltraFire UBS1RF
- Battery: AA alkaline batteries (included)
- Warranty: 10 year warranty
- Large test and hush button
- Toast-proof sensor
- Wireless interlink up to 50 compatible alarms
- No central control panel needed
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS EN 14604: 2005
Radio-Interlinked Battery Powered Heat Alarm - UltraFire UBH1RF
- Battery: AA alkaline batteries (included)
- Warranty: 10 year warranty
- Large test and hush button
- Wireless interlink up to 50 compatible alarms
- Range of up to 35m in buildings
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS 5446-2: 2003
Radio-Interlinked Smoke Alarms and Heat Alarm Home Essentials Kit - UltraFire UFUB1RFKIT
- Battery powered with AA alkaline batteries
- Warranty: 10 year warranty
- Large test & hush button
- Wirelessly interlink up to 50 UltraFire UB1RF series alarms
- 2 x optical smoke alarms and 1 x heat alarm included
- Suitable for BS 5839-6: 2019 Grade F2 installations
10 Year Longlife Battery Optical Smoke Alarm Twin Pack - Kidde 10Y29
- FREE delivery
- Battery: Built-in, lasts the lifetime of your alarm - GUARANTEED
- Warranty: 10 year warranty
- Features test and hush buttons
- Low Volume Test feature
- 2 x KE10Y29 smoke alarms
- Suitable for BS 5839-6: 2019 (Grade F1 installations)
- Kitemarked to BS EN 14604: 2005
10 Year Thermally Enhanced Optical Smoke Alarm (Thermoptek) - FireAngel ST-622
- Battery: Built-in, lasts the lifetime of your alarm
- Warranty: 5 year warranty
- Combined smoke and heat alarm (Thermoptek)
- Test, hush and Sleep Easy™ feature
- Optical sensor less prone to false alarms
- Suitable for BS 5839-6: 2019 (Grade F1 installations)
- Kitemarked to BS EN 14604:2005
Thermally Enhanced Optical Smoke Alarm (Thermoptek) - ST622 Twin Pack
- Battery: Built-in, lasts the lifetime of your alarm
- Warranty: 5 year warranty
- 2 x optical smoke alarms included
- Test, hush and Sleep Easy™ feature
- Thermoptek sensor less prone to false alarms
- Suitable for BS 5839-6: 2019 (Grade F1 installations)
- Kitemarked to BS EN 14604:2005
Battery Optical Smoke Alarm - FireAngel SB1-R
- Battery: 9V alkaline battery (included)
- Warranty: 5 year warranty
- Test and hush feature
- Ideal for areas adjacent to the kitchen
- Optical smoke sensor technology
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS EN 14604: 2005
Battery Optical Smoke Alarm - FireAngel SB1-TPR Twin Pack
- Battery: 9V battery powered (included)
- Warranty: 5 year warranty
- Smoke alarm twin pack
- Test and hush feature
- Ideal for areas adjacent to kitchens
- Suitable for BS 5839-6: 2019 Grade F2 installations
- Certified to BS EN 14604: 2005
Kidde 10Y29 Optical Smoke Alarm & K10LLCO Carbon Monoxide Detector Special Offer
- FREE delivery
- 10 year battery powered optical smoke alarm
- Certified to BS EN 14604: 2005
- 10 year battery powered carbon monoxide detector
- Kitemarked and CE marked
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Battery Powered Smoke Alarms
Grade F1 Smoke Alarm
Smoke Alarm Battery
Battery Powered Smoke Alarms
Battery operated smoke alarms are the entry-level of fire detection, typically powered by a single 9V PP3 battery or two 1.5V AA batteries – or by sealed long-life lithium cells which do not need replacing for the full lifespan of the smoke detectors.
Battery-powered smoke alarms are further divided into ionisation,optical and heat alarms. Ionisation alarms are suitable for landings and hallways. However, these have been phased out and have been replaced with the advanced optical technology. Optical smoke detectors are suitable for all the locations ionisation alarms would have been fitted and also for bedrooms, living rooms, and hallways. Heat alarms are designed to be installed in the kitchen and garage, along with other rooms in which optical or ionisation sensors would suffer false alarms due to dust, fumes, steam, or other contaminants. If you have one of these older units, and it has reached the end of its life, visit our smoke and heat alarm replacement page to find a suitable substitute.
Within our range of battery-operated detectors, there is a gradual improvement from simple standalone AA-powered smoke detection to thermally enhanced alarms with 10-year sealed batteries, which are capable of interlinking with mains-powered alarms via radio frequency. Interlinked smoke alarms have the advantage that if one alarm detects a fire, all other smoke alarms get notified as well and will sound. This is particularly important if, for example, the bedrooms are far removed from the kitchen, or if specialist equipment is required, such as strobe lights and vibrating pads for individuals with hearing and visual impairments.
Grade F1 Smoke Alarm
Our range of battery-only powered smoke detectors comply with Grade F requirements under BS 5839-6: 2019. These alarms provide the lowest permissible level of fire protection in the home.
Meeting Grade F1 Requirements
F1 requirements can be met by sealed long-life lithium battery powered smoke and heat alarms. Replaceable 9V alkaline battery-operated units only fulfil F2 criteria. If your building requires F1 coverage, it is therefore essential that you fit sealed units with long-life lithium batteries.
Meeting requirements for higher smoke alarm grades
Some buildings require a higher level of coverage than battery only detectors (F2 & F1) can provide. These higher grades of alarm are mains powered with back-up batteries (replaceable alkaline or sealed lithium), to provide additional protection. These alarms meet the requirements of Grades D1 and D2. If you require to meet this higher Grade, please take a look at our mains powered smoke alarm range.It is worth noting that you cannot fit a grade of detector which is ‘too high’. The higher the alarm grade, the better protected your home will be. Therefore, even if your property only requires Grade F detectors, you should consider investing in mains powered alarms with back up batteries, and radio or hardwire interlinks to provide the earliest possible warning to a fire and keep your loved ones safe.
Smoke Alarm Battery
All smoke alarms have batteries: low level alarms (Grade F) are powered by batteries only; higher level alarms (Grade D) are mains powered with back-up batteries.
In Grade F alarms and Grade D alarms, there are units available with replaceable alkaline batteries, and long-life sealed lithium batteries. Lithium battery powered units offer a ‘fit and forget’ solution, as they have a tamper proof battery, which does not require replacement throughout the lifespan of the alarm. Whereas alkaline options require the batteries to be replaced every year or so.
All smoke and heat alarms provide audible warnings when the battery requires to be replaced or if the alarm is coming to the end of its life. The audible warning is usually an intermittent beep, which in some cases can be silenced temporarily by the test/hush button, until the battery or alarm is replaced. If a sealed unit beeps like this, this means that it has reached the end of its life, and needs to be replaced. When replacing alkaline batteries, check the ‘replace by’ date on the back of the unit to ensure that it is still within its lifespan, and to be aware that it may be reaching the end of its life. This is important because the sensor of any type of alarm, optical or heat, becomes less effective over time. So, an out-of-date alarm may offer little or no protection in your home. If your unit has reached or is nearing this date, visit our smoke and heat alarm replacement page for a suitable replacement.
If you are sure that your battery or unit is not out of date but find that it is beeping, read our blog for additional support.
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