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9V Radio-Interlink Smoke & Heat Alarms with Lithium Battery - Ei600RF Series

Discontinued Product

This product has been discontinued.

alternative product

Ei600 Series 10 Year Heat & Optical Smoke Alarms

  • Battery operated - 10 year sealed lithium battery
  • Wireless radio-interlinked - can interlink with both mains and battery operated alarms
  • 10 year sealed lithium battery
  • Frequently accepted as alternative to mains powered alarms
  • Suitable for BS 5839-6: 2013 Grade F1 installations
  • Please note: alarms are sold individually
  • Also suitable for the 2022 Scottish legislation

£92.83 inc VAT

£77.36 ex VAT

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Product Overview

The Ei600RF series smoke and heat alarms with 10 year sealed lithium battery give total peace of mind over the entire product life without ever having to change batteries. These alarms are also widely accepted as an alternative to BS5839-pt6 Grade D (mains powered, interlinked alarms). Installing these units cuts out the need for an electrician, visible wiring and hence avoids mess and disruption.

  • Battery powered radio-interlinked optical smoke alarms with 10 year battery life. You never have to change batteries in the 10 year lifespan of product
  • Ideal for extensions and newly decorated properties
  • Requires no cables between units and no mains power supply
  • Up to 12 radio-interlinked smoke alarms or heat alarms can be interlinked
  • RF range: 150 metres (minimum) in free space and up to 30 metres in buildings
  • Suitable for installations complying to BS 5839-6: 2013 Grade F. Usually accepted as alternative to Grade D
  • Built-in radioLINK repeater function allows for the RF signal to work around obstructions
  • Digitally coded to avoid interference with neighbouring systems
  • Optical version VdS approved to BS EN 14604:2005 and CE marked
  • Can be used with manual break points and control switches
  • Features - smoke alarm: test and hush button, heat alarm - test button only
  • Made by Ei Electronics in Ireland
  • 5 year warranty
  • If you are required to install BS5839 pt 6 grade D, present a print out of this page to your Building Inspector before purchasing to ensure that they will be accepted.

Please Note: These units use the radio-interlink frequency 868.499MHz. This bandwidth is restricted for safety products, therefore the chances of interference should be limited.


The table below shows all the units that can interlink with the EI600RF.

Alarms from the Same Series

Model Number
Type of unit
Type of interlink
Ei650RF Battery powered optical alarm Radio-interlinked
Ei603TYCRF Battery powered heat alarm Radio-interlinked

Compatible Alarms

Model Number
Type of unit
Type of interlink
Ei161eRF Ionisation Smoke Alarm Radio-interlinked using the Ei100MRF module
Ei164eRF Heat Alarm Radio-interlinked using the Ei100MRF module
Ei166eRF Optical Smoke Alarm Radio-interlinked using the Ei100MRF module
Ei2110eRF Multi Sensor Smoke & Heat Alarm Radio-interlinked using the Ei100MRF module
Ei168RC/141RC Mains powered ionisation alarm (Alkaline back up) Radio-interlinked using the Ei168RC base
Ei168RC/144RC Mains powered heat alarm (Alkaline back up) Radio-interlinked using the Ei168RC base
Ei168RC/146RC Mains powered optical alarm (Alkaline back up) Radio-interlinked using the Ei168RC base

Carbon Monoxide Alarms

Model Number
Type of unit
Type of interlink
Ei208WRF Battery powered CO detector Radio-interlinked
Ei262 Mains powered CO detector Radio-interlinked
Ancillary Products
Model Number
Type of unit
Type of interlink
Ei407 Wireless Manual Call Point Radio-interlinked
Ei411H Wireless Locate, Hush and Remote test switch Radio-interlinked
Ei412 Wireless Fire and CO Alarm Control Switch Radio-interlinked
Ei450 Wireless Fire and CO Alarm Controller Radio-interlinked
Technical Data
Product Code
Radio-Interlinked Optical Smoke Alarm - Ei650RF EI650RF
Radio-Interlinked Heat Alarm - Ei603TYCRF EI603TYCRF
Brand EI Electronics
Battery Type

Longlife Lithium

Dimensions (HxDia)

Heat (Alkaline Battery): 55x115mm

Heat (Lithium Battery): 55x115mm

Optical (Alkaline Battery): 45x115mm

Optical (Lithium Battery): 45x115mm

Operating Temperature

0°C to 40°C

Relative Humidity

15% to 95% Relative Humidity

Sound Output



EI650RF: 0.22kg

EI603TYCRF: 0.2kg

Product Datasheets
FAQs (10)
Q. Would the Ei600 series be suitable for installation in flats? The system needs to be grade A or grade D.

The Ei600 series does not conform to grades A & D, it conforms to grade F, relating to battery operated interlinking smoke detection. Both grade A and grade D systems relate to mains powered interlinking alarm systems. The alarms that would be suitable for your application are the Ei140 series and the Kidde Firex.

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.

Q. Where more than one radio-interlinked battery operated smoke alarm is installed, if the battery in one alarm failed would the other alarms be affected?

If one alarm was to malfunction the other units would not be affected, if it was due to alarm failure. If the fault was with the radio-interlinking signal, then all alarms that are in the chain after the faulty alarm would be affected and they would not go off.

Q. Do I need to take out all the batteries in my radio-interlinked alarms before adding a new alarm into the system?

No, you do not need to remove all the batteries. Just simply press the house code button on all the units. Please ensure that the batteries have full power as this could render the house code process incomplete.

Q. Do the radio interlinked units give out a constant signal all the time and does this decrease the battery life more than a non-interlinked alarm?

Yes, radio interlinked alarms are periodically sending and receiving signals from other units in the network and therefore the life of the battery is reduced. Units with alkaline batteries should have the batteries are changed annually [unless they are fitted with a sealed 10 year battery as eg in the Ei600RF series].

Q. If the radio interlinking signal on one unit fails will the units still work as stand alone units.

Yes, should the radio interlinking signal fail the units will continue to sound independently should they detect a fire.

Q. What is the difference between Ei3100RF radio-interlinked smoke alarm series and the Ei600 series of radio-interlinked smoke alarms? Why does one cost much more than the other?

The EI600RF series are a later model and on top of all the features that the Ei3100RF offers, the series has the possibility to use the locate feature in the control switch, making the product more similar to a BS5839 part 6 Grade A alarm system. Additionally, the Ei600 series smoke alarms are offered with a true ten year life sealed lithium battery which makes the alarms acceptable in most circumstances as a BS5839 part 6 Grade D fire alarm system. This offers a substantial saving to customers, as it replaces the need for an electrician installing mains powered alarms.

Q. Can the Ei600RF series be connected with a CO detector?

Yes, the Ei208WRF CO detector is suitable and we recommend that you also install a Ei412 locator switch to allow you to find out if an alarm was caused by CO gas or by a fire.

Q. Does this alarm conform to BS 5446 part 1 as recommended by the Fire Service?

BS 5446-1:2000 was withdrawn in 2008 and replaced by BS EN 14604:2005 to conform with European standards. All of our alarms containing a smoke detector (smoke only, smoke & heat, smoke & CO) are fully compliant with BS EN 14604:2005. They also comply with any other relevant standards relating to their other detection capabilities.

Q. Please could you explain how the repeater function works on the Aico/Ei radio interlinked detectors.

Hello. The radioLINK repeater function allows the smoke alarm to "repeat" the radio frequency signal around obstructions. This stops the signal from becoming blocked and ensures that all interlinked alarms can be reached. This repeater function is built-in to the the Ei168RC radioLINK base (with Ei140, Ei160 or Ei2110 alarm), the Ei600 series of radio interlinked battery powered smoke and heat alarms as well as the Ei262 and Ei208WRF carbon monoxide alarms as standard. When house coded, the system works itself out which alarms are to act as repeaters - it's not something you set up yourself.

Customer Reviews

14 customers have given this product an overall rating of 4.6 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by:

suitably noisy, Do I get any warning before a battery runs down?

Published on: 3rd September 2017

Rating: 5 / 5 Stars

Reviewed by:

So easy to fit and link.

Published on: 30th January 2017

Rating: 4 / 5 Stars

Reviewed by:

So far, so good

Published on: 19th May 2015

Rating: 4 / 5 Stars

Reviewed by:

Does what it says on the tin. Slightly difficult to work out how to put them together. Took about 20 mins of head scratching and deciphering instructions before it became clear. Since then, no trouble. Great bit of kit.

Published on: 11th February 2015

Rating: 4 / 5 Stars

Reviewed by:

Does what it says on the tin. Slightly difficult to work out how to put them together then test. Took about 20 mins of head scratching and deciphering instructions before it became clear. Since then, no trouble. Great bit of kit.

Published on: 11th February 2015

Rating: 5 / 5 Stars

Reviewed by:

Good but expensive See my review of EI168RC161RC

Published on: 4th October 2014

Rating: 5 / 5 Stars

Reviewed by:

excellent product

Published on: 26th January 2014

Rating: 5 / 5 Stars

Reviewed by:

very good

Published on: 26th January 2014

Rating: 4 / 5 Stars

Reviewed by:

Great product, easy to install.

Published on: 3rd November 2013

Customer didn't leave a rating

Reviewed by:

Five stars for the product, even our building control inspector was surprised with how they worked. He is now looking to recommend this product for property's that previously would have needed to have mains powered versions fitted which would require rewiring.

Published on: 13th November 2012

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