I have 2 batteries that stoped working, when using the HUB it blinks 2 times green and then go red.

Dont show any light in the battery.

Any help?

Hi, thank you for reaching out and we're sorry for the inconvenience caused. May I ask how many batteries do you have right now? Are all batteries doing the same thing? Also, can you please send us a sample video showing the problem for us to further isolate the problem. In addition, can you please try to charge the DJI Spark using a USB cable to see if the problem persists. You may refer to the tutorial below. Please keep us posted. Thank you!