CALL OUR TEAM NOW 0800 612 6254 Also FREE from UK mobiles

10 Year Longlife Battery Heat Alarm - Ei603

Discontinued Product

This product has been discontinued and is no longer available to buy.

View Alternative Products
Product Overview

The Ei603 heat alarm detects fire by sensing the rise in temperature of its surroundings rather than sampling the air, and its sealed 10 year lithium battery means the alarm will continue to provide continuous detection without the need to regularly replace its batteries. By detecting heat instead of smoke the Ei603 will not suffer nuisance alarms caused by large amounts of dust, cooking fumes, and steam as traditional smoke alarms would, making this alarm suitable for the loft, kitchen, or garage.

  • Battery: Built-in lithium battery
  • Warranty: 5 year warranty
  • Red LED status indicator – flashes every 40 seconds during normal operation
  • Simple twist-on base design for easy installation
  • Screw fixings supplied, optional adhesive pad can be added before checkout
  • Suitable for installations complying to BS 5839-6: 2019 Grade F1
  • Self-test performed every 16 seconds
  • CE Marked and Kitemarked to BS 5446-2: 2003
Technical Data
Product Code EI603
Alternative Product Codes EI603, Ei603, Ei603C, Ei603C-D, Ei603TYC, Ei603TYC-D
Brand EI Electronics
Battery Type

10 Year Sealed Lithium

Dimensions (HxDia)


Operating Temperature

Storage: 0°C to +35°C

Operating: 0°C to +40°C

Relative Humidity

15% to 95%

Sound Output



5 Years

Weight 0.20kg
Product Datasheets
FAQs (9)
Q. What smoke alarm should I use in a bedroom with an en suite bathroom?

It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.

Q. How do I safely dispose of my old smoke alarms?

Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit

Q. Can a smoke alarm be fitted with a sticky adhesive pad in a let property?

The sticky pad is suitable for all battery operated smoke alarms. However, we cannot judge if battery alarms are suitable for your let property, as let properties usually require mains powered alarms. There is some advice to this in the governments guides to fire risk assessments.
Also see the LACoRS guide for let properties.

Q. How are smoke alarms fitted to the ceiling?

Smoke alarms can be either screwed to the ceiling using the holes on the base plate (screws provided) or fixed using a sticky pad, this can be added to your basket through the ordering process.

Q. Do the Ei600 series alarms need 230v or do they just use battery?

The Ei600 series of radio-interlinked alarms are completely battery operated. This means that they do not need to be wired up to the mains circuit. On the website, we offer the Ei600 series with a standard 9v battery or with a 10 year lithium longlife battery. The standard 9V batteries last approximately 12-18 months depending on how often the detectors are tested. The lithium battery units are sealed and last 10 years i.e. the full lifespan of the detector.

Show All

Looking for more information?

If you have any questions or would like more information about/ this product you can ask one of our specialists.

Direct Telephone 01507 464181