We had some work done on the house last year and the electrics were disconnected for over a week. Once reconnected the alarm said low battery. I bought a new battery, tested it to make sure it was charged and then popped it in the unit.
The keypad still said low battery but I thought maybe it just needed time to sense the new battery.
Fast forward a month and it's still saying low battery. I took the battery out and tested it, the charge has gone.
The alarm is connected to the mains, why won't it recognise the battery and retain the charge, is there a setting I need to change, like a reset when I replace the battery?