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Sigma M30 siren has a new 7.2v battery fitted


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HI all 

I posted about mouse eating the wires to the sounder ,all these have now been repaired ,and a new 7.2V  back up Battery fitted in side the siren unit ,(the siren is on the bench in the garage)when the old Battery was in there was no sound from the alarm., Now with the new Battery fitted and siren still on the bench it is making a clicking sound . Is this normal .

Thanks for any help 


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