opacey Posted December 21, 2015 Author Share Posted December 21, 2015 Thank you all kindly for the input. Tomorrow I will try testing the batt voltage, while still installed, and after cutting the mains (with the flick of a switch rather than than the lethal grasp of scissors!) If it falls then we have a bad battery. If it sustains around 12v then we have a bad panel. Is that the right thinking? Thanks! PS, Will check the fuse too - thanks for the tip. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/39487-ade-accenta-g4-backup-battery-fault-mystery/page/2/#findComment-437034 Share on other sites More sharing options...
opacey Posted February 11, 2016 Author Share Posted February 11, 2016 It was indeed a dead battery! I bought and installed a new AB21, switched off the mains (didn't even let the battery 'settle in') and no alarm bells rang. Sadly my circuit tester had broken so I took the gamble, based on your consensus, and paid for the new battery. Well worth it! Thanks for all the help everyone. Very much appreciated. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/39487-ade-accenta-g4-backup-battery-fault-mystery/page/2/#findComment-440415 Share on other sites More sharing options...
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