Guest Andyp Posted November 20, 2003 Share Posted November 20, 2003 In defence of a Large National, when I was a service engineer we always changed batteries on the service before the 5th anniversay of fitting. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/852-battery-capacity/page/2/#findComment-4688 Share on other sites More sharing options...
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