Battery came in after 15 days. Installation was easy enough with provided tools and it holds charge well.
It arrived in two months to Germany but it's the Corona times so I say nothing, just informing. Still, very good service from my point of view with cost-free logistics. The important thing is that I was able to fix my Kindle just for nearly 8 bucks in total and didn't have to but a new one for more than 100 euros. One quick tip for disassembling: don't pry too deep into the screen as you may damage the thin plastic over the screen as I did. Oops :]