I just bought the Ronin M a couple weeks ago, and 1 of the 2 batteries will not light up or charge. I have tried holding the button for a couple seconds, then waiting 20 minutes, still no change. I am assuming the battery is completely dead, but thought I would ask if anyone is familiar with this problem. I have looked thru the forums, and it appears most of the battery issues revolve around not charging, but nobody mentions the lights not lighting up at all.

Hi mrwells, we're sorry for the troubles. If the battery is under warranty period, please kindly start a case and send the battery in: https://repair.dji.com/repair/index The local team will take care once the package arrived. If you encounter any difficulties during the progress, feel free to contact us with the case number, we'll try our best to help.