When the ADC-VDB770 was first released, one of its newest features was a battery with a warmer. This allows the doorbell to work in colder climates without issues. However, users in hot climates have experienced some issues. So, the doorbell will now ship with a battery-less insert instead.
Installations that use a digital chime require a battery, and will not be able to use the battery-free insert. For those customers ordering a new ADC-VDB770 in July 2023 or later, who will be using the doorbell with a digital chime, you must also purchase the ADC-VDBA-770BAT. This is the battery replacement kit for existing ADC-VDB770 units whose battery has reached its end of life, and for new users who will use a digital chime.
If you will be using a mechanical chime, or the wireless chime available from Alarm.com, then you can install the ADC-VDB770 with the included battery-free insert. It charges quickly, which makes for a quick and easy installation. Users in colder climates may also need to purchase the ADC-VDBA-770BAT to prevent issues associated with extremely cold weather.
The purpose of the battery in the ADC-VDB770 is to power the video doorbell for the short period of time that the button is pressed. During a button press, the power circuit of the video doorbell is shorted, which is what causes the doorbell to chime. If not for the battery (or battery-free insert) the doorbell would lose all power during the button press. For a traditional doorbell, this is not a problem. But for a video doorbell, it is.
The battery-free insert, which will now be shipped with the ADC-VDB770 rather than the battery and warmer, is a capacitor that stores a charge. It provides enough power to keep the video doorbell powered while the button is pressed. However, digital chimes require that the button be pressed for a longer period of time, which is why for those chime types the battery is required.
Customers who had overheating issues with the ADC-VDB770 as it was originally sold, with a battery and heater, usually had the doorbell mounted in a location where it got lots of direct sunlight. The battery-free insert is currently not available for individual sale, but this may change in the future. If it does, we’ll let you know. For now, if you have an original Alarm.com ADC-VDB770 and the battery is at its end-of-life you will need to replace it with the ADC-VDBA-770BAT.
