Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected. Lead-Free Status All Firex alarms are lead-free. Back up provided by 9V replaceable battery.
eBay
AIPEKE 4200mWh Rechargeable batteries usb type c 1.5v lithium rechargeable battery AA for Control toys Clocks Smoke Detector
Aliexpress UK
Available with a 8 amp relay (SMK23RU) or without relay (SMK4896). The SMK23RU pattress features a relay circuit board allowing the alarm unit to switch other devices on or off. Firex smoke, heat alarm surface mounting pattress.
eBay
PUJIMAX 9V Ni-MH Rechargable Battery with 4-Slots Charger 280mAh Batteries for Guitar Microphone Smoke Detector Multimeter
Aliexpress UK
Brand new box of Kf20R smoke alarms (x6)
eBay
Long-Lasting 9V Rechargeable Lithium-Ion Battery 21800mWh High Capacity with Cable for Guitar Microphone Smoke Detector Pedal
Aliexpress UK
These alarms comply with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6). Lead-Free Status: All Firex alarms are lead-free. Button Test: Simulates the effect of smoke within the sensing chamber, checks electronics and sounder.
eBay
21800mWh High Capacity Long-Lasting 9V Rechargeable Lithium-Ion Battery with Cable for Guitar Microphone Smoke Detector Pedal
Aliexpress UK
The table below shows all the units that can interlink with the Firex KF10, KF20 and KF30. Alternative Product CodesKF20 KF30 KF2 KF3 4000 4870 4899 4973 9HI 9HILLs. This kit is supplied with three smoke alarms and one heat alarm from the Kidde Firex KF range.
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Aqara Water Leakage Sensor Water Leak Detector Sensor IP67 For Home Remote Alarm Security Sensor for Mi Home Homekit app
Aliexpress UK
The Kidde KF20R is Mains-powered optical smoke alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat. These alarms comply with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).
eBay
Scare off would-be intruders and alert the neighborhood with this wireless 105 dB indoor/outdoor siren. Loud 105 dB siren makes sure the alarm is heard when a security risk is detected. IP65 weather-resistant design, so the siren can be used indoors...
eufy UK
Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected. Lead-Free Status All Firex alarms are lead-free. Back up provided by 9V replaceable battery.
eBay
Ewelink Zigbee Door Sensor Wireless Magnetic Window Open Closed Alarm Detector Works With Zigbee2MQTT Alexa Google Need Gateway
Aliexpress UK
X3 kiddie Firex KF20R smoke alarms brand new
eBay
EWelink ZigBee Door Window Sensor Smart Home Wireless Door Open Close Detector APP Remote Alarm Works with Alexa Google Home Z2M
Aliexpress UK