How long will Alea's batteries last? Brad January 08, 2019 18:22 Updated Depending on usage, 2 to 3 years. Related articles Will I be notified when I need to change Alea's batteries? How do I control my Alea vents? Can Alea harm my heating and cooling equipment? How secure is Alea Air? Comments 0 comments Please sign in to leave a comment.