If you think those pre-installed apps on your
#Android device would stay dormant if you'd never touch them, you're in for a surprise: run "adb shell dumpsys batterystats > battstats", open that file, read it bottom up.
I had a test device lying on my desk for a day. Just connected via USB for testing
#Adebar. No other use. Still: Google Photos had been running for 2h+, Contacts 3h+, Youtube 11.5h, Messenging 2.5h+, …
I wonder what they were doing WITHOUT THE USER. Especially YT and G Photos.