TheCall Unit batteries, which have a life expectancy of approx. 9 months - 3 years depending on usage and type, are automatically monitored for 'battery low'. When this occurs, a signal is sent to the Main Panel. The Call Unit number appears on this display with no sounder.

In room with more than one transmitter, i.e. a bedroom with en-suite, the reassurance light on the Call Unit will be permanently illuminated, to give easy recognition of which unit requires a new battery.

Under 'low battery' conditions, a SEEK-AID Nurse Call Unit will still function for up to 5 days. Replacing batteries is a simple procedure; the same as that for replacing batteries in a radio.