I didn't see it mentioned and AFAIK, there is still no across-the-board standard for this, but, install a battery disconnect switch near the battery if one isn't present.
This is often not installed as a standard and is needed because the parasitic draw of the alarms and circuit boards will drain a perfectly good battery in a week if left connected. If the battery is left to drain more than a few times to 0% of charge, the battery will be toast and you'll be looking for a new battery. In lieu of a disconnect switch, disconnect the (-) terminal wire so the battery doesn't drain.
The
Blue Sea Switch is a good one for this purpose.
