Thanks.The battery charges as per the lights.It's after an outing so the batteries have cooled.If I'm out and try to charge a warm battery,it just blinks and I remove it.
How many blinks and which of the four LED's doing it? Battery blink codes as follows.
1. The charging current is too high or the charger voltage is too high (LED 2 blinks twice per second or LED 3 blinks three times per second).
Use the standard provided charger and charging cable to charge the battery.
2. Short circuit detected/internal communication error (LED 2 blinks three times per second).
Please send the battery back to DJI for testing, and click to submit an
Online Repair Request.
3. The battery voltage is too high due to overcharge (LED 3 blinks twice per second).
It is recommended to discharge the battery: Insert the battery into the aircraft, power on the aircraft to discharge the battery, and discharge to 1% before charging the battery. If the issue cannot be resolved through the above solution, please send the battery back to DJI for testing, and click to submit an
Online Repair Request.
4. The charging temperature is too high or low (LED 4 blinks twice or three times per second).
Charge the battery at a suitable ambient temperature (5°C-40°C).
• The battery temperature is high after flight, so it is recommended to let it stand for about 10 minutes before charging.
• In a low-temperature environment, it is recommended to insert the battery into the aircraft before charging, power on the aircraft and warm up for 5 minutes, then power off the drone and remove the battery for charging.
5. The battery is damaged (four LEDs blink three times per second).
Please send the battery back to DJI for testing, and click to submit an
Online Repair Request.
If your battery cannot be charged, the indicator does not blink during charging or the blinking pattern of the indicator does not fall under any of the above situations, please send the battery back for inspection and click to submit an
Online Repair Request.
source: DJI customer care.