Just come back from National Tyres and they are happy to change the battery for me, but couldn't fit me in as they were snowed under... so will be taking it there on 2nd January

i also wanted to ask about the battery isolator switch i`m going to get for my car...
this is a MUST for me i reckons, wont do any harm
but..... i have noticed that when you take the battery terminals off the battery and then reconnect them, the bloody alarm goes off correct?
its ear piercing!!!

but i guess if i disconnect the powersounder, this wont happen??
when i have the isolator switch fitted, will the alarm go off each time i want to turn the battery on and go out in the car?
wasn't sure if it would act like when you remove both cables from the battery terminals?
if i decide to go out in my car late at night, dont want the neighbours screaming at me when i wake the whole close up

meanwhile, i want to do a test and remove one of the terminals, or maybe both, leave my car for a week or more, then reconnect them, if my car starts then we DEFINITELY know that somethings draining it and its not just cold weather or lack of use..
but the above is a waste of time after the isolator is fitted
what do you guys think to all that?