Battery Abnormal: leds 3 and 4 blinks three times

When I try to charge the battery of my DJI Mini SE, 3 and 4 leds blinks 3 times every second.

I can´t find on the Manual User or other forums how to fix this, or if this means that the drone  - battery is dead.

Hi, Sincepto. Thank you for reaching out, and we're sorry you're experiencing such an issue. This behavior indicates Battery Communication Error. It could be the battery or the aircraft itself. Kindly ensure that the battery is inserted firmly into the drone. If you have an extra battery, kindly use it and check if the same issue persists. If there is another aircraft available, kindly use the same battery and test if the same reaction is observed. Please keep us updated. Thank you, and have a nice day.