The Alarm.com ADC-VDBA-770BAT replaces existing ADC-VDB770 batteries that have reached end-of-life. The ADC-VDBA-770BAT can also replace the battery-less insert in the ADC-VDB770. Homes with a wired digital chime require a battery and cannot use the battery-less insert. If you are using a digital chime and purchasing a new ADC-VDB770, this is a required accessory, since they now ship with a battery-less insert.

The ADC-VDB770 video doorbell previously shipped with an internal battery and heater to allow it to operate even in low temperature environments. Recently, they switched to a battery-less insert to allow it to operate in low temperature environments and also in environments with a lot of direct sunlight. The battery-less insert resists over-heating that can occur in warm environments with a lot of direct sunlight. This resulted in the change to overcome some of the battery-related challenges that some experienced in hot environments.

This change affects the following three models: ADC-VDB770, ADC-VDB770S, and ADC-VDB770BZ