Winter storage, removing battery, risk of alarm ringing?

[CDNIcecube]

Hi

I have a 1999 base that I have to store soon for 4 months. I am in Canada and I have a battery tender that I have used without issues every year I had the car (I.e. 3 years). This year, I plan to store it in a friend’s garage. The issue is that researching best practices for winter storage on this forum I read about the alarm ringing when the battery gets weak or slowly dies, or simply when disconnecting the battery.

While I plan to use the battery tender, a long power shortage at my friend’s house, or the tender getting accidentally unplugged, could lead to the battery discharging slowly and eventually dying. I don’t want the alarm to go off and disturb my friend and her family so I thought of unplugging the battery and bringing it home to my garage. Yet, I am not sure of the alarms on North America 1999 Boxsters do go off when the battery dies. I read that this seems perhaps the case in the UK. From another tread “On UK spec cars you need to turn the ignition on (idiot lights illuminated) before the battery is disconnected otherwise the alarm will sound with your head above it! Guess how I know? Also leave ignition on for reconnecting for the same reason.”

My questions are
1) does the alarm sound off when a 1999 base’s battery is dying or weak?
2) When disconnecting the battery, do we need to put the key in ignition so the alarm does not go off or is this a UK thing?

Thanks