User`s manual

Getting started
9
For longer battery life, lithium batteries (not provided) are recommended. Lithium
batteries provide approximately 30% additional battery life than alkaline batteries.
If you power up the doorbell with two AA battaries only, you can only start a video
streaming session with the doorbell instead of a handset. To have a full functional
doorbell, we recommand you also connect the doorbell to the AC power supply (see
Install the doorbell on pages 18-19).
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Doorbell battery installation
You can power up the doorbell by connecting it to the AC power supply or two AA
alkaline batteries (provided). Even if the doorbell is connected to the AC power supply,
we recommend you also install two AA alkaline batteries. This guarantees continual
operation in case of a power outage.
Install two AA batteries into the battery compartment, matching the polarity markings
(+ and -) inside the battery compartment.