Go to advent controls online they have one that will do for you
Forget the V2 Tel , it's far to complicated for what you want to do and will make your life difficult
But you have an enforcer better than the other old junk , euro panel and so , so forget the junk for collecting only and get something more
Em complicated , if you can master a dimension you can do any panel, I mean master it not blag it like me
It's a cr123 battery
Not easy to disable as there menu system is stupid
Pull wallet out call and engineer have it serviced and protect your home
Or rip off wall yourself and put in bin