How many batteries does the Array lock come with? September 04, 2018 18:55 Updated Follow The Array Lock comes with two batteries one to keep in the lock and one to keep on the charger. (Extra batteries and battery chargers can be purchased at arraylock.com) Related articles What type of battery does the Array use? How often will the battery need to be charged? What is the warranty policy for the Array Smart Deadbolt? E-Key Setup Instructions Can I open the door remotely from wherever I am?