This is a" Quick and dirty" script to disable battery notifications. I use my own  notification script based on @Sankotronic's battery reporting scene (see below) HC3 uses a new API and concept to configure different notifications.   The script reads all notifications, and disables LowBattery notification without modifying any other setting. I think it is not necessary to actually call this on each slave device, but it is slightly more difficult do that once per master device.