Unused LiPo battery is toast

[JeffreyS]

I bought another spare M3P battery a year or two ago and never needed it. Today I removed the plastic wrap and put it on the charger. Nothing. No lights. Dead. Is this typical of LiPo's that never get used? Is there a procedure to revive this thing?

 

[Cafguy]

It can happen BUT
Try charging the Battery in the drone to "activate" it.

 

[GFields]

Yes it can happen. I would follow Cafguy's advice to see it that works