Abus smoke detectors lithium batteries abus 11000 p the abus 11000 smoke detector lithium battery reacts to smoke particles if too much smoke enters its measuring chamber a loud alarm signal is triggered p p the smoke detector is mounted at the ceiling in the centre of a room the minimum distance to the walls should be 15cm the distance to the corners at least 50cm the operation range of the smoke detector is up to 40m sup2 we recommend installing one smoke detector each in