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I understand the Open Sesame systems use a battery. Do they need to be changed frequently?

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No. The door operator contains a single 12v, 1.2 Amp-hour sealed lead acid battery. This is what actually runs the system. This type is used in alarm systems. It should last at least 3 years. Some symptoms of needing a new battery are: the door opens and closes slow, the door may start occasionally, failing to open or close, or the clutch stays engaged after closing making the door hard to open manually. The remote control batteries are the type that can be found at a WalMart or a drug store. They should be replaced once a year.

Remote Control Batteries

The batteries used in our transmitters are shown below. They can be obtained at your local drug stores.
2-button transmitter
4-button transmitter
Replacement Battery = 12v 23A
keyless entry push pad
large wireless wall push pad commercial door opener
narrow wireless wall push pad
vertical push pad
Replacement Battery = 9v
push button door opener keychain transmitter
Replacement Batteries (2) =
3v 2016
push button door opener wireless wall touch pad
Replacement Battery =
3v CR123