Unfortunately, that means your battery is faulty and you’ll need to get a new one. If your watch is still under warranty (or if you had just bought the watch

The most common cause of failure of an inverter is an improper installation. Apart from this, other things that can hinder the smooth charging of an inverter are: Dead Batteries:

When a battery is getting too weak and needs replacing, your system may send you an alert or show ‘Lo Bat’ on the keypad display. The Alarm Panel requires (1)