Highfields Amateur Radio Club
Glossary Appendix.
copyright date

Battery Details.

This is an unusual and increasingly hard to find Silver Oxide battery. It is commonly used in remote alarm controls for VW and Audi alarm systems and is particularly widely used in later Volkswagen Logic immobilisers known as Logic, Conlog or Conlogic. These immobilisers were widely fitted to Audi, VW and Land Rover vehicles.

It is constructed from a stack of five SR41 button cells held with heat-shrink tubing. You will be able to see 393 or SR41 etched into the uppermost cell. If you prefer to 'do-it-yourself' you can stack 5 of these cells and wrap some electricians tape around them. Be sure to use the Silver Oxide cells though as the Alkaline ones are not suited to this application, due to lower voltage.


5×392, 5/392, 5/392, 5SR41, 5/SR41, Audi Alarm, CA25, Conlog Alarm, GP5/392, Seat Alarm, Skoda Alarm, VW Alarm, Volkswagen Logic Alarm,

not to scale.
Length × Diameter.
Chemical Composition. Nominal Voltage.
battery 5SR41. 17.6 mm × 7.9 mm

Flat base Positive.
Raised area other end Negative.

Silver Oxide, 7.7 volts
(46 mAh).

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