Ring Doorbell Integration - Battery Level Sensor

I added the Ring doorbell integration to Hass a few weeks ago. I am able to perform automations based on doorbell presses (e.g. play a ding-dong sound on all the Google Homes in the house) and can see stats in the default Ring.com sensors that are created. The battery level is one of these sensors and worked great for the first week or so, but now I am noticing the level go to 100% and back down again at regular intervals. Any idea what could be the reason for this?

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