We would advise to use the parent unit on mains power wherever possible and only to use battery power for moving to another position where the mains power can be re-connected. However there are ways in which you can extend the battery usage. Adjusting the brightness to a lower level, and using lower volume levels will help to extend the battery life. Also in battery mode if you use the shortest (5 minute) power saving mode setting then the display will turn off after 5 minutes but the audio will still carry on working, and then when you want to re-activate the video just press any button.
Do I need to register my baby unit to the parent unit?
No. The Baby Unit is pre-registered to your Parent Unit. You do not need to register it again unless the Baby Unit loses its link with the Parent Unit. Please consult your User Guide should you need to Pair your Units together again.
Does the baby unit need to be plugged in all the time?
The Baby Unit is able to operate without mains power for up to 3 hours with the support of a built-in rechargeable battery (Ni-MH battery 2.4V, 900mAh). Please charge the unit at least 16 hours before first time use.