What information your device may share
Your device may send information to Google for improving Location History. For example, your device may send information when Location services aren’t working properly.

Sent information could include:

Quality and length of your connections to mobile networks, GPS, Wi-Fi networks, or Bluetooth
State of your location settings
Restarts and crash reports
Apps used for turning Location History on or off
Battery levels

via Manage or delete your Location History – Google Account Help

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