Power cuts: Series3 Auto - how long will the air cells retain their pressure?

With the pump connected?

The air leaks gradually. After 4 hours, the upper air chamber (dynamic) will be totally deflated. The lower air chamber (static) could last for at least 24 hours under CPR valve being well installed (not be unplugged). This helps to prevent bottoming out.

With the pump disconnected and the transport cap in place?

The air leaks gradually. After 8 hours, the upper air chamber (dynamic) will be totally deflated. The lower air cells will remain inflated to prevent bottoming out. The lower air chamber (static) could last for at least 24 hours under CPR valve being well installed (not be unplugged). This helps to prevent bottoming out.