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10 Year Longlife Battery Interconnectable Optical Smoke Alarm - Ei3105TYC

Discontinued Product

This product has been discontinued.

Product Overview
The Ei3105TYC can be interconnected with up to 11 other units and has a sealed 10 year battery, meaning that there is no need to replace the battery for the entire lifespan of the unit.
  • 10 year sealed lithium cell operated smoke alarm 
  • 5 year warranty on alarm
  • Senses smoke using the light scatter principle
  • A maximum of 12 units can be interconnected via bell wire
  • Can be interconnected with bell wire to any other Ei interconnectable smoke alarm to ensure that the alarm is heard in all the house!
  • Alarms that can be interconnected include:
  • Kitemarked to BS EN 14604:2005
  • Suitable for installations complying to BS 5839-6: 2013 Grade F
  • CE marked
  • Hush button
  • 10 year end of life warning
  • Also suitable for Housing Associations
The table below shows all the units that can interconnect with the EI3105TYCH

Model Number
Type of unit
Type of interconnection
Ei100CNP Ionisation Alarm Hard wire interconnect
Ei103C Heat Alarm Hard wire interconnect
Ei105C Optical Alarm Hard wire interconnect
Ei100TYC Ionisation Smoke Alarm with 10yr Battery Hard wire interconnect
Ei3105TYC Optical Smoke Alarm with 10yr Battery Hard wire interconnect
Technical Data
Product Code EI3105TYCH
Brand EI Electronics
Battery Type

Longlife Lithium Battery

Dimensions (HxWxD)


Operating Temperature

0 to 40°C

Relative Humidity

0% to 90% Relative Humidity

Sound Output


Weight 0.28kg
Product Datasheets
FAQs (1)
Q. Can the battery be replaced after 10 years in the Ei3105TYC alarm?

No, firstly this alarm has a 10 year sealed lithium battery that can not be removed and secondly after 10 years the alarm should be replaced.

Customer Reviews

4 customers have given this product an overall rating of 5 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:

works well but not so easy to test as the Ei100tyc by other methods that pressing the button 10 year battery life still remains to be seen

Published on: 23rd December 2015

Rating: 5 / 5 Stars

Reviewed by:

Looks nice, easy to fit, loud test alarm.

Published on: 28th November 2014

Customer didn't leave a rating

Reviewed by:

Love your idea of an email to remind of frequency of tests - why not promote this idea on the web - it seems to be a unique idea

Published on: 31st August 2011

Rating: 5 / 5 Stars

Reviewed by:

Purchased to replace old re-chargeable battery inter-conneceted units. Comprehensive instructions enabled satisfactory installation of new units.

Published on: 31st January 2011

Customer didn't leave a rating

Reviewed by:

I have been using these products with alkaline batteries for ten years and have found them reliable. I've not had a fire but they do detect burnt toast! I live in a timber frame house and the master bedroom is over the garage so the interlinking facility is important. If I'm in bed I want to be sure to know if an alarm goes off anywhere in the house. This time I've gone for the 10 year lithium option, the overall cost is much the same but there is no need to worry about batteries.

Published on: 16th October 2010

Rating: 5 / 5 Stars

Reviewed by:

Published on: 16th May 2010

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