Your NavVis MLX battery charger LED indicator may glow in the following colors and patterns to mean:
One time red, orange, or green: The charger is testing itself and is ready for use.
Red or green blinking: The battery was recognized and the charger is initializing.
Orange light: The battery is charged and can be removed for use.
Red blinking: The battery is too hot or too cold. Charging it could cause damage. If the battery is too cold, it will be charged as soon as it warms up. If the battery is too hot, remove it from the charger to cool down.
Red light: The battery is damaged or cannot be recharged.