The operating status of the Battery Tender battery charger is indicated by an amber status light and a green status light.
If neither light is lit, then the battery is not properly connected and/or the charger is not plugged into AC power.
The following describes the status corresponding to each light pattern:
RED LIGHT FLASHING – The red light flashing indicates that the
battery charger has AC power available and that the
microprocessor is functioning properly. If the red light continues to
flash, then either the battery voltage is too low (less than 3 volts) or
the output alligator clips or ring terminals are not connected
RED LIGHT ON STEADY – Whenever the red light is on steady, a
battery is connected properly and the charger is charging the
battery. The red light will remain on until the charger completes the
GREEN LIGHT FLASHING – When the green light is flashing, and
the red light is on, the battery is greater than 80% charged and
may be removed from the charger and used if necessary.
Whenever possible, leave the battery on charge until the green
light is solid.
GREEN LIGHT ON STEADY – When the green light stops flashing
and burns steady, the charge is complete and the battery can be
returned to service if necessary. It can also stay connected to
maintain the battery for an indefinite period of time