You can view the last battery status of your CHRONOS device in the app.lympik.com web app under the "Devices" menu item.
You can use the status circle to see which operating status your devices are currently in (only possible on the PC). The following states are possible:
Green: Your device is online and ready for measurements.
Blue: Your device is in "Setup" mode.
Grey: Your device is not connected to the app.
Red: Your device has detected a possible error. This could be a light barrier that has been moved, for example.
Note: This status can also be viewed directly in the activity under "Configure route" (also possible on the PC/smartphone/tablet).