NOCO Genius G3500EU Guía Del Usuario Y Garantía página 6

6.) The charger is now charging and can be left connected to the battery.
Understanding Charge LEDs.
The charger has four (4) state-of-charge LEDs - 25%, 50%, 75% and 100%. See the explanation below:
LED
25% 25% 50% 75% 100%
Red LED
50%
25% 50% 75% 100%
Red LED
75%
25% 50% 75% 100%
Orange LED
100%
25% 50% 75% 100%
Green LED
Maintenance
25% 50% 75% 100%
Green LED
Understanding Advanced Diagnostics.
Advanced Diagnostics displays charging errors by flashing Error LED and Standby LED flashing back and forth. The number of flashes between
each pulse denotes the potential Error Condition (except reverse polarity and low-voltage battery).
Explanation
The 25% Charge LED will slowly pulse "on" and "off", when the battery is less than 25% fully charged. When
the battery is 25% charged, the red Charge LED will be solid.
The 50% Charge LED will slowly pulse "on" and "off", when the battery is less than 50% fully charged. When
the battery is 50% charged, the red Charge LED will be solid.
The 75% Charge LED will slowly pulse "on" and "off", when the battery is less than 75% fully charged. When
the battery is 75% charged, the orange Charge LED will be solid.
The 100% Charge LED will slowly pulse "on" and "off", when the battery is less than 100% fully charged.
When the battery is fully charged, the green LED will be solid, and the 25%, 50% and 75% Charge LEDs
will turn "off".
During maintenance charging, the 100% Charge LED will pulse "on" and "off" slowly. When the battery is
topped off and fully charged again, the 100% Charge LED will turn solid green. The charger can be left
connected to the battery indefinitely.