Go into the Settings menu, then Wireless, then Flight Mode. Press OK to disable Bluetooth communication.

All information is saved when you change the batteries of any Accu-Chek meter, including the memory, your logbook data, results, diary information, and settings. You should still check that the time and date are correct when you’ve inserted new batteries.

The Accu-Chek meters use two 3-volt lithium coin cell batteries (type CR2032) found in many stores.