Appears fully charged but won't start drone motors.

[offtheback]

Battery 1.5 years old.Has about 70 charge cycles.Well cared for.After charging the 4 LED's light up.Drone powers on but motors will not start.Message-only enough left for RTH,check battery connection,no charge readout on controller or tablet.Have cycled it down on Hantora+recharged but still no go.Any ideas or is it RIP?

 

[slup]

The missing battery readout in the app strongly indicate that this have nothing to do with the battery's state of charge... instead it's due that the communication between the drone & battery is not working, the firmware will not allow flights if it can't communicate with the battery.

Inspect & clean the connectors on both the battery & drone side... if other batteries are working in the drone the culprit is most likely with that single battery & it's possibility to communicate.

If nothing obvious is damaged connector wise & a cleaning don't solve it... then you might be out of luck.

 

[Starz]

Also you may want to try the DJI charger on the problem battery. I’m not familiar with the Hantora charger, but I tend to work with just the DJI products.
Worth a shot!

 

[mobilehomer]

Also, check for a firmware update.

 

[360 Guy]

Try another battery.