Bagder

Thanks for your advice. I'm not expecting regular power outages, but wanted to do my best to maintain cover if I was on holiday and for some reason the power failed or was interrupted. As you say, I think I'll have to scale back my ambition for battery backup. I suppose I could always use a DIY-style set-up as a back-up for those times. Battery aside, is there a mains powered system that fits the bill that anyone is aware of and would recommend?

Hi, I'm looking to install an alarm system for a steel shed with no windows. Alarms are all very new to me so I'd appreciate some advice. What I want to achieve is: - An audible alarm activated when the door is opened. - A system that runs on mains power, but which has a battery backup of at least 2 weeks. - Preferably some way of disabling the alarm before entering the shed, avoiding the need to have a period to allow for a code/key to be used to disable the alarrm once the door is open. - Surface contact sensors on the door. Is this achievable, or am I looking for something that doesn't exist? I'm open to other suggestions if anyone has any. All advice gratefully received. Thanks in advance.