Apple Watch Second Generation, Junk

I purchased this item 8 or 9 years ago and used it for a few months, but ended up not using it and it's been stored in a dark place for many years.I charged it up again recently, but it only occasionally displays something, and is mostly black.It's possible the battery is dead.I'm not familiar with the details, so I don't know the cause or how to fix it, but I'd like to offer it for sale. faultless for everyday use. first-class materials and excellent craftsmanship ensure long-lasting durability.