Nexx Garage - NXG-200 - Replacing the battery for Nexx Garage NXG-200 wireless sensor
When both LED lights are on, the battery on the wireless sensor needs to be replaced. The Nexx Home app will also notify you when the battery of the wireless sensor is low.
To replace the battery, pull down the bottom to reveal the battery compartment. Replace the battery with one 23A 12V Alkaline battery.