In the app: Battery→See the 12V history
From the guide: Battery tab
See the 12V history › opens the 12 V screen: graph for 24 h, 7 d, 30 d or 90 d, latest, lowest resting, average resting, how much of the awake time the car charged the 12 V, when the car last charged it, and the overnight drop per night. Share 12V data as CSV, a picture or a PDF.
From the guide: Sleep and the 12V battery
"Watch 12V while the car sleeps" (off by default) only asks the adapter for its own supply voltage (
ATRV), which puts nothing on the car's network, every 30 minutes (or 5 or 10), then disconnects so the adapter sleeps too.