New Kindles?

When is it that Amazon usually announces new Kindle models for the Christmas buying season? October? November?

I think the battery is starting to fade in my Paperwhite (doesn't last as long between charges), but I don't want to buy now so close to the shopping season and regret missing something new in the next couple of months in the Paperwhite line. The Paperwhite is still my choice of Kindle models.

Thanks for your help.