Topping off battery for flight in morning

Was topping off a battery I hadn’t used in about two months. Got this fault in picture. It was still charging so I unplugged the charger. Hopefully no damage to battery.

Just looked and noticed it would have shut off at 4.2 volt cell voltage. Guess I’m good.

U r good. This “Fault Alarm” is a bit misleading as there is nothing wrong, only that you reached the limit of your set voltage.