Left my Mini 3 Pro batteries dead all winter... anything I can do?

So I kinda forgot about my drone over the winter and left the batteries completely dead for like 6 months. Now, no surprise, they won’t charge at all. I’m guessing they’re done for, but is there anything I can do to maybe save them or at least make back some of the loss?

Also, are there any good places to get cheaper batteries that aren’t sketchy knock-offs? Like maybe refurbished ones? And if so, are refurbished batteries even worth trying?

Definitely avoid knock-offs. I’d check Facebook Marketplace or eBay — sometimes people sell batteries after they crash or lose their drone.

I’ve bought both new and used batteries from Adorama before and the prices were great. They’re guaranteed too. Last I checked, they had new ones for $65 which is a solid deal.

https://www.adorama.com/djim4proifb.html