To change the battery, proceed as follows:



  1. Unlock the locking mechanism. The locking mechanism itself has its own safety catch to prevent the lock from being opened accidentally. If the locking mechanism cannot be moved, first release the safety catch by pushing the safety catch towards the outside of the housing.

  2. Make sure that the locking mechanism (number 1 in the operating and display elements diagram) is set to unlocked. You can tell this because the slider is closer to the "open lock" symbol than "locked lock".    
  3. Now remove the battery as indicated and insert the new battery in the same way.


  4. Finally, lock the locking mechanism and close the safety catch.