Good day, I have two TB47 batteries. I haven't used them for ten months. Now they are stone dead and nothing happens when hooked to a charger. Anything I can do to revive them?

Just to clarify, are they swollen or malleable in any way? Based on what you've mentioned, they will not even light up on the first press? Where were they stored and at what percentage?

sounds like you can try to pop the top off and jump start them. i have a similar thread going and someone posted a video showing how.... but my batts are toast. the jump start does noting as my cells are all out of wack...

worth a shot though post #24

http://forum.dji.com/thread-98556-1-1.html

DJI-Jamie Posted at 2017-6-20 11:28
Just to clarify, are they swollen or malleable in any way? Based on what you've mentioned, they will not even light up on the first press? Where were they stored and at what percentage?

One battery  seams a little squishy. Other one feels fine. They have never been froze. And been stored in my house in the DJI case. I just tried the jump start , battery went from 1V to 18V. But status lights will not light up. Only flash one went first plugged to charger.

fans65f47989, Please dispose of them PROPERLY according to your local ordinance for LiPO Batteries. Please buy New Batteries!!!  PLEASE buy new batteries!!! Other than the props... That is the only thing holding you up Safety First! Ken.

fans65f47989 Posted at 2017-6-20 15:39
One battery  seams a little squishy. Other one feels fine. They have never been froze. And been stored in my house in the DJI case. I just tried the jump start , battery went from 1V to 18V. But status lights will not light up. Only flash one went first plugged to charger.

The one that's "squishy" should definitely be disposed of. If the other one will light up, try leaving on the charger for a while and see if it improves.